HomeMy WebLinkAboutMONTAVA - PHASE E TOWN CENTER - BDR220003 - MONTAVA SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER MANAGEMENT PLAN
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Stormwater Management Plan (SWMP)
For
Montava Subdivision Phase E: Town Center
July 2022
submitted to:
City of Fort Collins,
Colorado
748 Whalers Way
Table of Contents
Stormwater Management Plan
Montava Subdivision Phase E: Town Center
Page i
1.0 - SITE DESCRIPTION ............................................................................................... 1
1.1 Introduction ........................................................................................................ 1
1.2 Project Location and Description ..................................................................... 1
1.3 Proposed Sequence of Activities ..................................................................... 2
1.4 Existing Soil and Surface Conditions .............................................................. 3
1.5 Wetlands and Receiving Waters ....................................................................... 4
1.6 Storm Water Management Plan Administrator ............................................... 5
1.7 Potential Pollutants ........................................................................................... 5
2.0 - POLLUTION CONTROLS ...................................................................................... 5
2.1 Controls Overview ............................................................................................. 6
2.2 Erosion and Sediment Controls ....................................................................... 6
2.3 Materials Management .................................................................................... 11
2.4 Spill Management ............................................................................................ 13
2.5 Non-Storm Water Components of Discharge ................................................ 14
3.0 - INSPECTION AND MAINTENANCE .................................................................... 15
3.1 Inspection and Maintenance Overview .......................................................... 15
3.2 Minimum Monitoring Requirements ............................................................... 15
3.3 Reporting Requirements / Inspection Reports ............................................. 16
3.4 Site Maps .......................................................................................................... 17
4.0 - FINAL STABILIZATION / CONCLUSION ............................................................ 17
Discovery Air & Rocky Mountain Avenue Stormwater Management Plan
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5.0 - REFERENCES ...................................................................................................... 17
List of Figures
1.1 Vicinity Map ....................................................................................................................... 2
Technical Appendix
Appendix A - CDPHE General Permit for Storm Water Discharge – Construction Activity
Appendix B - CDPHE Construction Activity Permit Application
Appendix C - Urban Drainage and Flood Control District BMPs
Appendix D - Reporting Chemical Spills and Releases in Colorado
Appendix E - Sample Inspection Form
Appendix F - Inactivation/Reassignment Notices
Appendix G - Soil Survey Information
Montava Subdivision Phase E: Town Center Stormwater Management Plan
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1.0 - Site Description
1.1 Introduction
The following Storm Water Management Plan (SWMP) has been prepared for use during the
construction of the Montava Subdivision Phase E project. This plan describes recommended
procedures and best management practices, BMP’s, to assist the contractor in complying with
the Colorado Water Quality Control Act and the Federal Water Pollution Control Act. A copy of
the CDPHE General Permit for discharge is attached in Appendix A. The general permit is the
State law that requires this report and is provided for reference. A copy of the permit application
is provided in Appendix B for submittal to the State at least 10 days prior to beginning
grading activities. The intent of this plan is to provide the contractor a place to consolidate
records, logs, permits, applications etc. as well as guidance on water quality protection. It is
critical that the contractor understands that this plan is a living document that must be
updated and maintained throughout the construction process.
1.2 Project Location and Description
The Montava Subdivision Phase E: Town Center project site is located in Section 32, Township
8 North, Range 68 West of the 6th Principal Meridian, within the City of Fort Collins, Larimer
County, Colorado. The proposed site is bounded on the north by farmland and Future Montava
Subdivision phases, on the east by farmland, N. Giddings Road, and Future Montava
Subdivision phases, on the south by Mountain Vista Drive and farmland, on the west by the
Number 8 Outlet Ditch and Montava Subdivision phase G and Future Montava Subdivision
phases. The Montava Subdivision Phase E: Town Center project site contains approximately
39.00 acres and consists of the Multi-Family, Townhomes, Duplex, Single Family, Mixed-Use,
and Open Space. The Montava Subdivision Phase E: Town Center is currently zoned as Low
Density Mixed-Use Neighborhood District Flexible Overlay Zone (LMN).
A vicinity map illustrating the project location is provided in Figure 1.1.
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Figure 1.1: Vicinity Map
1.3 Proposed Sequence of Activities
The contractor is the SWMP Administrator and will be responsible for implementing and
maintaining the erosion and sediment control, and pollution prevention measures described in
this document and the accompanying construction drawings and specifications. The contractor
may designate certain tasks as he sees fit, but the ultimate responsibility for ensuring the
implementation of these controls and their proper function remains with the contractor. The
order of major activities will be as follows:
1. Site Preparation: Confirm project disturbance limitations with those indicated on the
Erosion Control Plan, and install initial sediment and erosion control and pollution
prevention BMP’s. All BMP’s must be shown on the Erosion Control Plan in the back
pocket of this report. Some BMP locations must be determined by the contractor and
marked on the plans in addition to the ones already shown.
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2. Schedule pre-construction inspection of BMPs with the City of Fort Collins to insure
proper installation and functionality. Fill out an inspection report, provided in Appendix
E, and file it in this report notebook.
3. The general site construction process will start with mobilization and clearing/stripping.
4. Grading activities will then be completed, which require the installation of inlet protection,
surface roughing and erosion control blankets on slopes steeper than 3:1.
5. Utility installation will be the next phase where attention should be given to waste
management, outdoor storage areas, dewatering requirements, and rip-rap installation.
6. With the completion of utilities, the hardscape will start, which will require that attention
be given to items such as spill containment and concrete washout areas.
7. When the hardscape is completed the buildings will start construction. Around each
individual building, site perimeter protection, such as staked straw wattles, shall be
installed for areas where sediment can run onto the hardscape.
8. As areas are completed the installation of permanent BMP’s, such as seeding, mulching,
spray-on matrix or rolled erosion control blankets on slopes shall be added.
9. Temporary seeding shall be added to areas that won’t be stabilized within 30 days.
10. Remove all temporary BMPs upon establishment of sufficient vegetative cover or other
permanent stabilization.
If at any time construction ceases for a period expected to exceed 30 days, such as the project
being split into multiple phases, temporary seeding of future phases shall be installed until
construction of each future phase has begun. In the event that the project is split into phases or
suspended, the permit may need to be inactivated or reassigned to next administrator.
1.4 Existing Soil and Surface Conditions
The types of soils found on the Montava Subdivision Phase E site consist of:
Caruso Clay Loam (22) - 0 to 1 percent slope.
Fort Collins Loam (35) – 0 to 3 percent slopes.
Kim loam (54) – 3 to 5 percent slopes.
Satanta loam (94) – 0 to 1 percent slopes.
Satanta Variant clay loam (98) – 0 to 3 percent slopes.
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Stoneham loam (101) – 1 to 3 percent slopes.
Stoneham loam (102) – 3 to 5 percent slopes.
Stoneham Loam (103) – 5 to 9 percent slopes.
The characteristics of the soil found on the project site include:
Moderate infiltration rate when thoroughly wet.
Moderately fine texture to moderately coarse texture.
Moderate rate of water transmission.
These soils consist of the following hydrologic soil groups as defined in the United States
Department of Agriculture (USDA), Web Soil Survey:
Group B – 18.70%
Group C – 24.30%
Group D – 57.00%
The USDA web soil survey report is included in Appendix G.
1.5 Wetlands and Receiving Waters
The Montava Subdivision Phase E is located in development is a 20.8-acre undeveloped lot
west of the Anheuser Busch property. According to FCSCM, runoff from the undeveloped site
generally sheet flows in the southeasterly direction towards the Larimer and Weld Canal
Montava Subdivision Phase E is located in. See the Martin/Martin Master Drainage Study for
more information about the existing conditions. According to the Montava Master Drainage
Study, Montava Subdivision Phase E is primarily located within Basin F, Basin G1, and Basin
G2. The portion of Montava Subdivision Phase E located in Basin F will generally flow
southeasterly into a pond designed with the Master Drainage Study. The portion of Montava
Subdivision Phase E located with Basin G1 will generally flow southeast and into a pond
proposed with the Master Drainage Study. The portion of Montava Subdivision Phase E located
in Basin G2 will generally flow southwest into a proposed pond and outfall directly into the
Number 8 Ditch. These existing drainage patterns were maintained with the development of the
Montava Subdivision Phase E project.
The proposed Montava Subdivision Phase E development generally maintains existing drainage
patterns. The entirety of the site will continue to flow northwest through proposed storm
infrastructure to the location of the existing detention pond. The existing detention pond will be
increased in size to over-detain runoff from the developed condition of the site. An outlet
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structure will attenuate storm runoff to a historic rate of 0.04 cfs/acre. The outlet structure will
outlet into an existing swale northwest of the site.
1.6 Storm Water Management Plan Administrator
_________________________ shall be the designated SWMP Administrator for the Project. It
will be his or her responsibility to insure the SWMP's adequacy at all times to effectively manage
potential storm water pollutants throughout the course of construction.
1.7 Potential Pollutants
Below is a list of potential pollution sources that can occur during the construction of site
improvements and potential remedies, or the appropriate section that should be referenced for
controlling these pollution sources:
All disturbed and stored soils – (Surface roughening, reseeding, mulching and silt
fence)
Vehicle tracking of sediments – (Vehicle tracking pads, street sweeping)
Management of contaminated soils – (See Section 2.3.2)
Loading and unloading operations – (See Section 2.2.3 - Stabilized Staging
Area)
Outdoor storage activities (building materials, fertilizers, chemicals, etc.) – (See
Section 2.3)
Vehicle and equipment maintenance and fueling - (See Section 2.3.2)
Significant dust or particulate generating processes – (See Section 2.2.3 – Wind
Erosion/Dust Control)
Routine maintenance activities involving fertilizers, pesticides, detergents, fuels,
solvents, oils, etc. (See Section 2.3.2)
On-site waste management practices (waste piles, liquid wastes, dumpsters,
etc.) – (See Section 2.3)
Concrete truck/equipment washing, including the concrete truck chute and
associated fixtures and equipment - (Use concrete wash-out)
Dedicated asphalt and concrete batch plants – (Not used on this project)
Non-industrial waste sources such as worker trash and portable toilets – (See
Section 2.3.2.- BMP’s for San/Septic Waste)
Other areas or procedures where potential spills can occur (See Section 2.3)
2.0 - Pollution Controls
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2.1 Controls Overview
During construction, several control measures shall be implemented under the direction of the
contractor to prevent discharge of contaminated water. Specifications and details for specific
control measures are included in Appendix C of this report for use on the project. In addition to
those structural measures, other controls include non-structural practices, materials
management, spill prevention and management, and other miscellaneous controls as described
in the following sections.
2.2 Erosion and Sediment Controls
The objective of erosion control is to limit the amount of erosion occurring on disturbed areas
until stabilized. The objective of sediment control is to capture soil that has eroded before it
leaves the construction site. Despite the use of both erosion and sediment control measures, it
is recognized that some sediment could remain in runoff, especially during very large storm
events. The contractor shall utilize the best management practices (BMP’s) described in the
following sections to minimize the above potential to the maximum extent practicable.
During all phases of construction, the contractor should plan ahead of possible rainfall events
and work to limit erosion from occurring where potential exists. Where potential does exist
provide adequate conveyance, temporary or permanent, and direct runoff to BMP’s that trap
sediment. The erosion and sediment BMP’s anticipated for use on the site include both
structural and non-structural practices.
2.2.1 Structural Practices
Structural BMPs are structures that limit erosion and sediment transport. Such
Practices include check dams, silt fence, inlet and outlet protection, water quality ponds, and
grading techniques. The structural BMP’s that will be utilized on the subject site are described
in more detail as follows:
Check Dams
Can be constructed of rock, gravel bags or sandbags across a swale or channel
Used to slow the velocity of concentrated flow in a channel and reduce erosion
Used to catch sediment by capturing contaminated runoff
Most effective when used with other erosion prevention BMPs
Should not be used for basins exceeding 2-5 acres
Should be used in series with the base elevation of the upstream dam set at the
same elevation or lower than the downstream dam.
Sediment Control Logs (Wattles)
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A linear roll made of natural materials such as straw or coconut fiber and staked
to the ground with a wooden stake
To be used as a sediment barrier to intercept sheet flow from disturbed areas –
as perimeter control around stockpiles, inlet protection, check dams for small
drainage swales with low velocity
To be installed along the contour
Remove accumulated sediment once the depth is one half the height of the
sediment log and repair damage
Brush Barrier
A perimeter sediment control constructed with stacked shrubs, tree limbs and
bushy vegetation that has been cleared from the construction area
Appropriate for areas where adequate brush has been cleared from the site
Used at toe of slopes and should be implemented in combination with other
BMP’s such as surface roughening and seeding.
Considered short-term BMP because the materials naturally decompose
An effective brush barrier will be constructed with small shrubs and limbs with 6”
diameter or less. The brush barrier mound should be at least 3’ high and 5’ wide
at its base.
A filter fabric can be placed over the top of the pile to avoid significant movement.
Silt Fence
A temporary vertical barrier attached to and supported by posts entrenched in the
ground
Utilized to intercept sediment from disturbed areas during construction
For use in areas of shallow flow, not concentrated runoff
Typically used at the toe of fills and in transitions between cuts and fills and along
streams
Usually used as a perimeter control.
Installed prior to any land disturbing activity
Shall be inspected periodically and after each rain or snowmelt event
Not effective as a wind break.
Water Quality Ponds
A small temporary or permanent ponding area with a hard-lined spillway
Utilized to detain sediment laden storm water and allow particles to settle out
Should be installed prior to other land disturbing activities upstream
Best used with other erosion prevention practices to limit sediment load in pond
During construction, sediment shall be removed when the wet storage is reduced
by half
Full capacity of ponds shall be re-established following stabilization
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Grading Techniques
Soil surface roughening, terracing and rounding at tops of cuts, transitions and
roadway ditches to facilitate vegetation and minimize erosion
Disk surface to create ridges at least 6 inches deep following the land contour
Used to temporarily stabilize disturbed areas immediately after grading
After rain storm events, rills that formed should be repaired immediately
2.2.2 Non-Structural Practices
Non-structural BMPs are both temporary and permanent stabilization practices. Such practices
may include surface roughening, temporary or permanent seeding, mulching, geotextiles and
maintaining existing vegetation. The non-structural BMPs that will be used on the site include
the following:
Surface Roughening
Tracking, scarifying, tilling a disturbed area to provide temporary stabilization and
minimize wind and water erosion.
Not a stand-alone BMP and should be used with other BMP’s
Temporary and Permanent Seeding
Soil preparation, disking, and soil amendments are necessary for proper seed
bed establishment.
Seeded areas should be inspected regularly. Areas that fail to establish shall be
re-seeded promptly.
Any area exposed for more than 30 days after construction has ceased shall be
seeded and mulched
Permanent landscape cover shall be installed according to the landscape plan
Mulching
Application of plant residues to the soil surface. Typical mulching materials
include certified weed free hay or straw, certified under the Colorado Department
of Agriculture Weed Free Forage Certification Program.
Utilized in combination with tackifier during high winds, steep slopes, or due to
seasonal constraints.
Used to cover permanent and temporarily seeded areas.
Inspect frequently and reapply in areas where mulching has loosened or
removed.
Maintain Existing Vegetation – Vegetated Buffers
Preserved natural vegetation helps protect waterways and wetlands from land
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disturbing activities and improve stormwater runoff quality by straining sediment
and promoting infiltration.
Concentrated flow should not be directed through a vegetated buffer, instead
runoff should be in the form of sheet flow
Used in conjunction with other perimeter control BMP’s such as sediment control
logs or silt fence
Clearly delineate the boundary of the natural buffer area using construction or silt
fencing
Construction Fence
Used to restrict site access to designated entrances and exits and delineates
construction site boundaries
Used to protect natural areas or areas that should not be disturbed
Construction fencing may be chain link or plastic mesh fencing
Rolled Erosion Control Products:
A special blanket or liner that prevents erosion while vegetation is established
and aids in establishment by preserving moisture available to the seed
The blankets need to cover the necessary area of the graded slope and bottom
channel.
The blanket will be installed according to the manufacturer’s instructions and
specifications. The number of staples or fasteners is critical while vegetation is
still germinating
The erosion control blankets will be installed once the slopes of the vegetated
swales have reached final grade or on areas where erosion is occurring during
construction.
The erosion control blanket will be inspected weekly and immediately after storm
events to determine if cracks, tears, or breaches have been formed in the fabric.
If so the blanket will be repaired or replaced immediately.
Good contact with the soil will be maintained and erosion will not occur under the
blanket. Any areas where the blanket is not in close contact with the ground will
be repaired or replaced.
Utilized as both temporary and permanent feature depending on grade.
2.2.3 Other Controls
Vehicle Tracking Control/ Construction Entrance
A temporary stabilized layer of aggregate underlined with geotextile or gravel
located where traffic enters or exits the construction site
Should be installed prior to any construction and inspected daily
Does not work well alone in muddy conditions – use tire washing when mud is
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present. Implementation of tire washing should include provisions for collecting
wash water and directing it to a treatment pond
Whenever possible locate the construction entrance as far from the disturbed
area as possible to allow maximum travel time for sediment removal from tires.
Public and Private roadways shall be kept clear of accumulated sediment.
Cleaning sediment shall not be accomplished by flushing with water. Sediment
should be shoveled or swept from the street and placed away from storm water
improvements.
Consider limiting vehicles from entering the site when conditions are wet or
muddy.
Wind Erosion / Dust Control
Dust from the site will be controlled using a mobile pressure-type distributor truck
to apply portable water to disturbed areas. The mobile unit will apply water only
as necessary to prevent runoff and ponding.
Dust control will be implemented as needed once site grading has been initiated
and during windy conditions while site grading is occurring.
Spraying of portable water will be performed whenever the dryness of the soil
warrants it.
At least one mobile unit will be available at all time to distribute portable water to
control dust on the project area.
During high winds limit traffic speeds to 12 mph or less on areas without gravel or
pavement.
Gravel can be placed on construction roads, entrances, and construction staging
areas. Stone/gravel provides an effective protective cover over the soil.
In areas where wind erosion is expected soil-binding tackifiers can be applied
with high success.
Stabilized Staging Area
A clearly designated area where construction equipment and vehicles, waste
bins and other construction related materials are stored
This area should be designated on the SWMP map.
Appropriate space to provide loading/unloading operations and parking
A stabilized surface, paved or covered in 3” diameter aggregate or larger
Perimeter controls such as silt fence, sediment control logs or construction
fencing
Vehicle Tracking Control pad to be used in conjunction with a Stabilized Staging
Area if this area is adjacent to a public roadway
Dewatering Operations
Dewatering typically involves pumping water from an inundated area to a BMP
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and then downstream to a receiving waterway, sediment basin or vegetated
area. Dewatering typically involves the use of several BMP’s in sequence
All dewatering discharges must be treated to remove sediment before
discharging from a construction site. Discharging water into a sediment trap or
basin or filter bag, series of straw bales or sediment logs are options.
Stockpile Management
Implement measures to minimize erosion and sediment transport from stockpiles.
Locate stockpiles away from all drainage system components
Place BMP’s around the perimeter of the stockpile such as sediment control logs,
rock socks, silt fence, straw bales and sand bags
For active use stockpiles, provide a stabilized access point upgradient of the
stockpile.
Surface roughening, temporary seeding and mulching, erosion control blankets
may be needed for stockpiles older than 30 days.
2.3 Materials Management
2.3.1 Potential Pollution Sources
Abnormal or especially hazardous materials are not expected to be utilized during the
construction of the project, but like most construction projects, some materials or substances
used have the potential to be hazardous when leaked into the storm water runoff. The following
materials could potentially be present onsite during construction:
Concrete/Additives/Wastes Cleaning Solvents
Detergents Petroleum based products
Paints/Solvents Pesticides
Acids Fertilizers
Construction Wastes Sanitary wastes
Soil Stabilization additives
Activities on the site that may impact storm water include the following:
Equipment storage/Washing/Fueling
Storage of Fertilizers/Chemicals/Paint/Fuel
Waste storage/disposal
Sanitary facility use and disposal
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As construction progresses, specific areas shall be designated for the above-mentioned
activities and materials management operations. The contractor is responsible to marking the
location of these facilities on the site map and reporting on the condition, effectiveness and
corrections or changes made and why.
2.3.2 Pollution Prevention Measures
Pollution prevention measures should be utilized to prevent construction materials with the
potential for polluting storm water from coming in contact with runoff. Measures include good
housekeeping, proper disposal and storage, spill prevention, and secondary containment.
BMPs for most common construction materials and wastes with the greatest potential for
adversely affecting water quality are as follows:
BMPs for Construction Waste:
Select a designated waste collection area onsite
Locate containers in level areas away from storm water conveyance structures
Provide covers for containers that contain very hazardous or soluble chemicals
Avoid putting paint/solvent containers in open dumpsters or allow them to dry
completely before disposing
If a container does spill, provide clean up immediately
Make sure waste is disposed of at authorized disposal areas
BMPs for Hazardous Waste Disposal
Check with local waste management authorities with regard to requirements for
disposing of hazardous materials
Use entire product before disposing
Dispose of containers with lids on and tightly sealed
Provide a separate dumpster for large amounts of chemical or hazardous
material and maintain more stringent controls on that dumpster
Do not remove the product label from containers, it contains important disposal
information
BMPs for Sanitary/Septic Wastes
If self-contained, temporary sanitary facilities are used, the waste disposal
company should service the facilities based on the number of workers anticipated
to avoid over use.
All facilities should be anchored to the ground to prevent overturning due to wind
or accident
Locate portable toilets away from curbs, swales or other locations where
concentrated runoff may occur.
Do not dump any hazardous materials into the sanitary waste disposal systems.
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BMPs for pesticides/fertilizers
Store pesticides in a dry covered area and elevate above the ground
Provide secondary containment barriers around areas where a lot of material is
stored. Straw Wattles are NOT appropriate containment barriers!
Strictly follow recommended application rates and application methods
Apply fertilizer more frequently and at lower rates.
Reduce exposure of nutrients to storm events by working fertilizer deep into soil
BMPs for petroleum products
Fueling operations shall occur in a designated area.
Store petroleum products in covered areas and away from areas where
concentrated runoff occurs.
Provide secondary containment barriers around areas where a lot of material is
stored. Straw Wattles are NOT appropriate containment barriers!
Schedule preventative maintenance for onsite equipment and fix any gas/oil
leaks on a regular basis
Follow procedures for proper handling of asphalt and sealers
Secure fueling equipment and install valves to prevent vandalism/theft
2.4 Spill Management
Construction site supervisors should create and adopt a spill control plan that includes
measures and procedures to stop the source of the spill, contain the spill, clean up, and dispose
of contaminated materials. Key personnel should be identified and trained to be responsible for
spill prevention and control. The following measures would be appropriate for a spill prevention
response plan:
Store and handle materials to prevent spills
Tightly seal containers
Make sure all containers are neatly labeled
Stack containers carefully for stability to avoid spills.
Limit the height of stacks of stored materials
Whenever possible store materials on covered pallets or in trailers with adequate
ventilation
Eliminate storm water contact if there is a spill
Have cleanup procedures clearly posted
Have cleanup materials readily available and posted
Immediately contain any liquid
Stop the source of the spill
Cover spill with absorbent material and dispose of properly
Additionally, records of spills, leaks, or overflows that result in the discharge of pollutants must
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be documented and maintained.
When any spill occurs:
1) Notify the controlling operator of the site immediately following a hazardous spill.
2) Document the spill and its clean-up procedures whether reporting is required or not.
3) At a minimum document the following:
Nature of spill
Quantity of spill
Date/time spill occurred
Agency notification if necessary
Clean-up procedures used
Daily monitoring (7 days) after clean-up
Photographs
Interview(s) with any witnesses of the event
Some spills will need to be reported to the Division of Water Quality immediately including the
following:
Over 25 gallons of petroleum
5 CCs of mercury
a release of any chemical, oil, petroleum product which entered waters of the State of
Colorado (which include surface water, groundwater, dry gullies or storm sewers leading
to surface water).
Any spill or release of raw sewage
If any of the above criteria is met or exceeded, the Colorado Department of Public Health and
Environment, Local Emergency Planning committee, downstream users and other agencies
(MS4s) will be notified. The CDPHE will be notified by telephone within 24 hours. In addition,
written notification describing the spill and the clean up procedures used will be sent to the
agencies 5 days following the spill. If a spill does not meet the above criteria, reporting is not
mandatory.
See Appendix D for the Divisions requirements. The Divisions 24-hour environmental
emergency spill reporting line is 1-877-518-5608.
2.5 Non-Storm Water Components of Discharge
Non-storm water discharges must be avoided or reduced to the maximum extent possible. This
SWMP plan assumes construction dewatering will be required. Pumping or draining
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groundwater, even groundwater that has infiltrated an excavation, requires a separate permit
from the State. Storm water that mixes with groundwater is also subject to the controls in the
general permit for Construction Dewatering. The permit requirements and application for
Construction dewatering is available at:
http://www.cdphe.state.co.us/wq/PermitsUnit/construction.html.
No materials shall be discharged in quantities that may impact storm water runoff. Possible
discharge sources that need to be contained include:
Locations where water tanks are being filled. Seal all leaks and avoid over filling. Any
leaks should be directed to a water quality pond or protected to prevent erosion.
Contain excess water during fire hydrant blow off, water system cleaning or other
instances where potable water is discharged onto the surface. Convey any discharge to
a water quality pond and avoid causing erosion by avoiding steep slopes, disturbed
areas, etc.
Monitor irrigation systems and fix leaks promptly. Avoid over irrigating areas where
vegetation is not yet established.
3.0 - Inspection and Maintenance
3.1 Inspection and Maintenance Overview
A site inspection of all erosion control facilities shall be conducted at least once every two
weeks and immediately following any significant storm event, including snowmelt that can cause
surface erosion and at least every 30 days for inactive projects. The inspection must determine
if there is any evidence of, or the potential for, pollutants entering the drainage system. BMPs
should be inspected to see if they meet the design and operation criteria in the SWMP and that
they are adequately controlling potential pollutants. Any defects shall be corrected promptly.
Where spill kits have been used, or storage areas moved, supplies shall be restocked and re-
protected. The site shall be inspected by the SWMP administrator or someone with adequate
training who should monitor and follow the procedures outlined below:
3.2 Minimum Monitoring Requirements
Inspections of the site shall be conducted by the contractor (or agent) every two weeks
and after significant storm events.
Inspections are required at least every 30 days and after measurable storm events for
sites that are no longer under construction, but do not have 70% established ground
cover.
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A qualified superintendent familiar with this SWMP and BMPs shall perform the
inspections.
The contractor shall certify that the site is in compliance with the permit by:
Ensuring areas where significant runoff is occurring are identified on the site map
Storm water outfall shall be observed to determine whether or not measurable quantities
of sediment or other pollutants have been or are being transported offsite.
BMPs shall be addressed to determine if they are functioning properly or if they are in
need of repair or maintenance. If the report describes deficiencies in pollution control
structures or procedures, such deficiencies shall be corrected immediately
A brief description of measures taken to correct deficiencies shall be recorded.
Determine if additional controls will be needed to next week’s activities.
When an inspection does not identify any incidents of non-compliance, the report shall
contain a certification that the site is in compliance with the SWMP and this permit.
The date and inspector identity shall also be recorded. This record shall be signed made
available to the State or City upon request.
Based on the results of the inspection, the description of potential pollutant sources, and the
control measures used should be updated on the SWMP and Site Maps as soon as possible.
Typically, corrective action shall commence immediately when a deficiency is observed. SWMP
and Map updates shall be completed within 72 hours. Another inspection should follow up and
include the date, corrective action taken, and initials of who certified the work.
3.3 Reporting Requirements / Inspection Reports
The contractor is responsible for reporting of all BMP inspections and maintaining
records of reports and maps throughout the project. The record shall be retained onsite
and/or readily available until the inactivation notice has been filed. All inspection reports
shall be submitted to the owner when the permit becomes inactive. A
recommended/example inspection is included in Appendix E. At a minimum, the
inspection reports shall contain the following:
Dates
Name(s) of inspectors
Purpose of inspection e.g. spill event, leakage of materials, storm event, bi-
weekly inspection, etc.
Montava Subdivision Phase E: Town Center Stormwater Management Plan
Page 17
When a bi-weekly report, an assessment of the entire property as related to
SWMP issues
An estimated area of currently disturbed area.
Evaluation of all active BMPs
Actions needed to assure continued compliance with SWMP guidelines
Document all areas of potential pollution sources and how they are protected
Documentation of any needed changes
Training events
Uncontrolled releases of mud or muddy water or measurable amounts of
sediment
An estimated amount of precipitation. An onsite rain gauge is suggested.
3.4 Site Maps
In the back pocket of this report notebook there is an Erosion Control Plan for use during
construction. The purpose of this plan is to provide the contractor a place to document and plan
BMP’s used during construction. Because the placement of individual BMP’s will depend on the
condition of the site and the contractor’s judgment, not all BMP’s are shown on the plans. It is
the contractor’s duty as site administrator to determine the need for and placement of BMPs and
mark them on the map.
4.0 - Final Stabilization / Conclusion
Permanent stabilization will be achieved by establishing vegetative or permanent surface cover
on all disturbed areas. The final vegetative cover is specified on the Erosion Control Plan.
Vegetative cover is considered complete when 70 percent of the pre-disturbance plant density is
restored. In cases where the site was already disturbed, the existing gravel ponds for example,
the pre-disturbance density will be the naturally occurring cover on currently vegetated areas.
The contractor shall remove all temporary erosion and sediment control BMPs after stabilization
is achieved or after temporary BMPs are no longer needed. Trapped sediment (including within
pipes) will be removed by the contractor or stabilized onsite. Disturbed soil areas resulting from
removal of BMPs or the contractor will permanently stabilize vegetation as soon as possible.
Again, this plan is a living document that will need to be updated and maintained
throughout the construction process and until all areas of the site have been stabilized.
This permit will remain active until an inactivation notice has been filed with the State.
Additionally, this permit may be transferred to another party in the event that the contractor or
sub-contractor responsible for its implementation leaves the site before stabilization has
occurred. The Inactivation Notice and Reassignment Notices are included in Appendix F.
5.0 - References
Montava Subdivision Phase E: Town Center Stormwater Management Plan
Page 18
1. CDOT Erosion Control and Storm Water Quality Guide, Colorado Department of
Transportation, 2002
2. Urban Storm Drainage Criteria Manual, Urban Drainage and Flood Control District (Rev.
July, 2001)
3. Storm Water Risk Management, LLC; April 11, 2008; Pre-Construction & Engineering
Training for Construction Storm Water Management Manual.
4. Construction Site Storm Water Runoff Control – National Menu of best practices, U.S.
Environmental Protection Agency, 1999
APPENDIX A
CDPHE General Permit for Storm Water Discharge –
Construction Activity
COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT
Water Quality Control Division
CDPS GENERAL PERMIT STORMWATER DISCHARGES ASSOCIATED WITH
CONSTRUCTION ACTIVITY AUTHORIZATION TO DISCHARGE UNDER THE COLORADO DISCHARGE PERMIT SYSTEM (CDPS)
COR400000
In compliance with the provisions of the Colorado Water Quality Control Act, (25-8-101 et seq., CRS, 1973 as amended)
and the Federal Water Pollution Control Act, as amended (33 U.S.C. 1 251 et seq.; the "Act"), this permit authorizes the
discharge of stormwater associated with construction activities (and specific allowable non-stormwater discharges in
accordance with Part I.A.1. of the permit) certified under this permit, from those locations specified throughout the State
of Colorado to specified waters of the State.
Such discharges shall be in accordance with the conditions of this permit. This permit specifically authorizes the facility
listed on the certification to discharge in accordance with permit requirements and conditions set forth in Parts I and II
hereof. All discharges authorized herein shall be consistent with the terms and conditions of this permit.
This permit becomes effective on April 1, 2019, and shall expire at midnight March 31, 2024.
Issued and signed this 28th day of January, 2021.
Meg Parish, Permits Section Manager Water Quality Control Division
COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT
Permit History
Minor Modification Issued January 28, 2021 Effective February 1, 2021
Modification Issued December 31, 2020 Effective February 1, 2021
Originally signed and issued October 31, 2018; effective April 1, 2019
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Permit No. COR400000
Table of Contents
PART I ............................................................................................................................................ 3
A. COVERAGE UNDER THIS PERMIT .................................................................................................. 3
1. Authorized Discharges ...................................................................................................... 3
2. Limitations on Coverage ................................................................................................... 3
3. Permit Certification and Submittal Procedures ....................................................................... 4
B. EFFLUENT LIMITATIONS ............................................................................................................ 8
1. Requirements for Control Measures Used to Meet Effluent Limitations ........................................... 8
2. Discharges to an Impaired Waterbody .................................................................................. 11
3. General Requirements .................................................................................................... 12
C. STORMWATER MANAGEMENT PLAN (SWMP) REQUIREMENTS ................................................................ 12
1. SWMP General Requirements ............................................................................................ 12
2. SWMP Content .............................................................................................................. 13
3. SWMP Review and Revisions .............................................................................................. 15
4. SWMP Availability .......................................................................................................... 16
D. SITE INSPECTIONS .................................................................................................................. 16
1. Person Responsible for Conducting Inspections ...................................................................... 16
2. Inspection Frequency ...................................................................................................... 16
3. Inspection Frequency for Discharges to Outstanding Waters ....................................................... 17
4. Reduced Inspection Frequency .......................................................................................... 17
5. Inspection Scope ........................................................................................................... 17
E. DEFINITIONS ......................................................................................................................... 19
F. MONITORING ........................................................................................................................ 22
G. OIL AND GAS CONSTRUCTION .................................................................................................... 22
PART II: STANDARD PERMIT CONDITIONS .................................................................................................. 24
A. DUTY TO COMPLY .................................................................................................................. 24
B. DUTY TO REAPPLY ................................................................................................................. 24
C. NEED TO HALT OR REDUCE ACTIVITY NOT A DEFENSE ....................................................................... 24
D. DUTY TO MITIGATE ................................................................................................................ 24
E. PROPER OPERATION AND MAINTENANCE ....................................................................................... 24
F. PERMIT ACTIONS .................................................................................................................... 24
G. PROPERTY RIGHTS ................................................................................................................. 24
H. DUTY TO PROVIDE INFORMATION ............................................................................................... 25
I. INSPECTION AND ENTRY ........................................................................................................... 25
J. MONITORING AND RECORDS ...................................................................................................... 25
K. SIGNATORY REQUIREMENTS ...................................................................................................... 26
1. Authorization to Sign: ..................................................................................................... 26
2. Electronic Signatures ...................................................................................................... 26
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Permit No. COR400000
3. Change in Authorization to Sign ......................................................................................... 26
L. REPORTING REQUIREMENTS ...................................................................................................... 27
1. Planned Changes ........................................................................................................... 27
2. Anticipated Non-Compliance ............................................................................................. 27
3. Transfer of Ownership or Control ....................................................................................... 27
4. Monitoring reports ......................................................................................................... 27
5. Compliance Schedules .................................................................................................... 27
6. Twenty-four Hour Reporting ............................................................................................. 28
7. Other Non-Compliance .................................................................................................... 28
8. Other Information .......................................................................................................... 28
M. BYPASS ............................................................................................................................... 28
1. Bypass Not Exceeding Limitations ....................................................................................... 28
2. Notice of Bypass ............................................................................................................ 28
3. Prohibition of Bypass ...................................................................................................... 28
N. UPSET ................................................................................................................................ 29
1. Effect of an upset .......................................................................................................... 29
2. Conditions Necessary for Demonstration of an Upset ............................................................... 29
3. Burden of Proof ............................................................................................................ 29
O. RETENTION OF RECORDS ......................................................................................................... 29
1. Post-Expiration or Termination Retention ............................................................................. 29
2. On-site Retention .......................................................................................................... 29
P. REOPENER CLAUSE ................................................................................................................. 30
1. Procedures for Modification or Revocation ............................................................................ 30
2. Water Quality Protection ................................................................................................. 30
Q. SEVERABILITY ....................................................................................................................... 30
R. NOTIFICATION REQUIREMENTS ................................................................................................... 30
1. Notification to Parties .................................................................................................... 30
S. RESPONSIBILITIES ................................................................................................................... 30
1. Reduction, Loss, or Failure of Treatment Facility ................................................................... 30
T. OIL AND HAZARDOUS SUBSTANCE LIABILITY ................................................................................... 30
U. EMERGENCY POWERS .............................................................................................................. 31
V. CONFIDENTIALITY .................................................................................................................. 31
W. FEES ................................................................................................................................. 31
X. DURATION OF PERMIT ............................................................................................................. 31
Y. SECTION 307 TOXICS ............................................................................................................... 31
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Permit No. COR400000
Part I
Note: At the first mention of terminology that has a specific connotation for the purposes of this permit, the terminology
is electronically linked to the definitions section of the permit in Part I.E.
A. COVERAGE UNDER THIS PERMIT
Authorized Discharges
This general permit authorizes permittee(s) to discharge the following to state waters: stormwater
associated with construction activity and specified non-stormwater associated with construction
activity. The following types of stormwater and non-stormwater discharges are authorized under this
permit:
a. Allowable Stormwater Discharges
i. Stormwater discharges associated with construction activity.
ii. Stormwater discharges associated with producing earthen materials, such as soils, sand, and
gravel dedicated to providing material to a single contiguous site, or within ¼ m ile of a
construction site (e.g. borrow or fill areas).
iii. Stormwater discharges associated with dedicated asphalt, concrete batch plants and masonry
mixing stations (Coverage under this permit is not required if alternative coverage has been
obtained.)
b. Allowable Non-Stormwater Discharges
The following non-stormwater discharges are allowable under this permit if the discharges are
identified in the stormwater management plan in accordance with Part I.C and if they have
appropriate control measures in accordance with Part I.B.1.
i. Discharges from uncontaminated springs that do not originate from an area of land
disturbance.
ii. Discharges to the ground of concrete washout water associated with the washing of concrete
tools and concrete mixer chutes. Discharges of concrete washout water must not leave the site
as surface runoff or reach receiving waters as defined by this permit. Concrete on-site waste
disposal is not authorized by this permit except in accordance with Part I.B.1.a.ii(b).
iii. Discharges of landscape irrigation return flow.
iv. Discharges from diversions of state waters within the permitted site.
c. Emergency Fire Fighting
Discharges resulting from emergency firefighting activities during the active emergency response
are authorized by this permit.
Limitations on Coverage
Discharges not authorized by this permit include, but are not limited to, the discharges and activities
listed below. Permittees may seek individual or alternate general permit coverage for the discharges, as
appropriate and available.
a. Discharges of Non-Stormwater
Discharges of non-stormwater, except the authorized non-stormwater discharges listed in Part
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Permit No. COR400000
I.A.1.b., are not eligible for coverage under this permit.
b. Discharges Currently Covered by another Individual or General Permit
c. Discharges Currently Covered by a Water Quality Control Division (division) Low Risk Guidance
Document
Permit Certification and Submittal Procedures
a. Duty to Apply
The following activities shall apply for coverage under this permit:
i. Construction activity that will disturb one acre or more; or
ii. Construction activity that is part of a common plan of development or sale; or
iii. Stormwater discharges that are designated by the division as needing a stormwater permit
because the discharge:
Contributes to a violation of a water quality standard; or
Is a significant contributor of pollutants to state waters.
b. Application Requirements
To obtain authorization to discharge under this permit, applicants applying for coverage following
the effective date of the renewal permit shall meet the following requirements:
i. Owners and operators submitting an application for permit coverage will be co - permittees
subject to the same benefits, duties, and obligations under this permit.
ii. Signature requirements: Both the owner and operator (permittee) of the construction site, as
defined in Part I.E., must agree to the terms and conditions of the permit and submit a
completed application that includes the signature of both the owner and the operator. In cases
where the duties of the owner and operator are managed by the owner, both application
signatures may be completed by the owner. Both the owner and operator are responsible for
ensuring compliance with all terms and conditions of the permit, including implementation of
the stormwater management plan.
iii. The applicant(s) must develop a stormwater management plan (SWMP) in accordance with the
requirements of Part I.C. The applicant(s) must also certify that the SWMP is complete, or will
be complete, prior to commencement of any construction activity.
iv. In order to apply for certification under this general permit, the applicant(s) must submit a
complete, accurate, and signed permit application form as provided by the division by
electronic delivery at least 10 days prior to the commencement of construction activity ,
except those construction activities that are in response to a public emergency related site;
public emergency related sites shall apply for coverage no later than 14 days after the
commencement of construction activities. The provisions of this part in no way remove a
violation of the Colorado Water Quality Control Act if a point source discharge occurs prior to
the issuance of a CDPS permit.
v. The application in its entirety must be submitted via the division’s online permitting system
unless a waiver is granted by the division. If a waiver is granted, the application in its entirety,
including signatures by both the owner and operator, must be submitted to:
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Permit No. COR400000
Colorado Department of Public Health and Environment
Water Quality Control Division
Permits Section, WQCD-PS-B2
4300 Cherry Creek Drive South
Denver, CO 80246
vi. The applicant(s) must receive written notification that the division granted permit coverage
prior to conducting construction activities except for construction activit ies that are in
response to a public emergency related site.
c. Division Review of Permit Application
Within 10 days of receipt of the application, and following review of the application, the division
may:
i. Issue a certification of coverage;
ii. Request additional information necessary to evaluate the discharge;
iii. Delay the authorization to discharge pending further review;
iv. Notify the applicant that additional terms and conditions are necessary; or
v. Deny the authorization to discharge under this general permit.
d. Alternative Permit Coverage
i. Division Required Alternative Permit Coverage:
The division may require an applicant or permittee to apply for an individual permit or an
alternative general permit if it determines the discharge does not fall under the scope of this
general permit, including if any additional terms and conditions are necessary in order to ensure
that discharges authorized by this permit shall not cause, have the reasonable potential to cause,
or measurably contribute to an exceedance of any applicable water quality standard, including
narrative standards for water quality. In this case, the division will notify the applicant or
permittee that an individual permit application is required.
ii. Permittee Request for Alternative Permit Coverage:
A permittee authorized to discharge stormwater under this permit may request to be excluded from
coverage under this general permit by applying for an individual permit. In this case, the permittee
must submit an individual application, with reasons supporting the request, to the division at least
180 days prior to any discharge. When an individual permit is issued, the permittee’s authorization
to discharge under this permit is terminated on the effective date of the individual permit.
e. Submittal Signature Requirements
Documents required for submittal to the division in accordance with this permit, including
applications for permit coverage and other documents as requested by the division, must include
signatures by both the owner and the operator, except for instances where the duties of the owner
and operator are managed by the owner.
Signatures on all documents submitted to the division as required by this permit must meet the
Standard Signatory Requirements in Part II.K of this permit in accordance with 40 C.F.R. 122.41(k).
i. Signature Certification
Any person(s) signing documents required for submittal to the division must make the following
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Permit No. COR400000
certification:
“I certify under penalty of law that this document and all attachm ents were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.”
f. Compliance Document Signature Requirements
Documents which are required for compliance with the permit, but for which submittal to the
division is not required unless specifically requested by the division, must be signed by the
individual(s) designated as the Qualified Stormwater Manager, as defined in Part I.E.
i. Any person(s) signing inspection documents required for compliance with the permit per Part
I.D.5.c.xiii must make the following statement and provide the date of the statement:
“I verify that, to the best of my knowledge and belief, that if any corrective action items were
identified during the inspection, those corrective actions are complete, and the site is currently in
compliance with the permit.”
g. Field Wide Permit Coverage for Oil and Gas Construction
At the discretion of the division, a single permit certification may be issued to a single oil and ga s
permittee to cover construction activity related discharges from an oil and gas field at multiple
locations that are not necessarily contiguous.
h. Permit Coverage without Application
Qualifying Local Program: When a small construction site is within the jurisdiction of a qualifying
local program, the owner and operator of the construction activity are authorized to discharge
stormwater associated with small construction activity under this general permit without the
submittal of an application to the division. Sites covered by a qualifying local program are exempt
from the following sections of this general permit: Part I.A.3.a.; Part I.A.3.b.; Part I.A.3.c.; Part
I.A.3.d.; Part I.A.3.g.; Part I.A.3.i.; Part I.A.3.j.; Part I.A.3.k.
Sites covered by a qualifying local program are subject to the following requirements:
i. Local Agency Authority: This permit does not pre-empt or supersede the authority of local
agencies to prohibit, restrict, or control discharges of stormwater to storm drain systems or
other water courses within their jurisdiction.
ii. Permit Coverage Termination: When a site under a Qualifying Local Program is finally
stabilized, coverage under this permit is automatically terminated.
iii. Compliance with Qualifying Local Program: Qualifying Local Program requirements that are
equivalent to the requirements of this permit are incorporated by reference. Permittees
authorized to discharge under this permit, must comply with the equivalent requirements of
the Qualifying Local Program that has jurisdiction over the site as a condition of this permit.
iv. Compliance with Remaining Permit Conditions. Requirements of this permit that are in
addition to or more stringent than the requirements of the Qualifying Local Program apply in
addition to the requirements of the Qualifying Local Program.
v. Written Authorization of Coverage: The division or local municipality may require any
permittee within the jurisdiction of a Qualifying Local Program covered under this permit to
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Permit No. COR400000
apply for, and obtain written authorization of coverage under this permit. The permittee must
be notified in writing that an application for written authorization of coverage is required.
i. Permittee Initiated Permit Actions
Permittee initiated permit actions, inc luding but not limited to modifications, contact changes,
transfers, and terminations, shall be conducted following Part II.L, division guidance and using
appropriate division-provided forms.
j. Sale of Residence to Homeowner
Residential construction sites only: The permittee may remove residential lots from permit
coverage once the lot meets the following criteria:
i. The residential lot has been sold to the homeowner(s) for private residential use;
ii. A certificate of occupancy, or equivalent, is maintained on-site and is available during division
inspections;
iii. The lot is less than one acre of disturbance;
iv. All construction activity conducted on the lot by the permittee is complete;
v. The permittee is not responsible for final stabilization of the lot; and
vi. The SWMP was modified to indicate the lot is no longer part of the construction activity.
If the residential lot meets the criteria listed above then activities occurring on the lot are no
longer considered to be construction activities with a duty to apply and maintain permit coverage.
Therefore, the permittee is not required to meet the final stabilization requirements and may
terminate permit coverage for the lot.
k. Permit Expiration and Continuation of Permit Coverage
Authorization to discharge under this general permit shall expire at midnight on March 31, 2024.
While Regulation 61.4 requires a permittee to submit an application for continuing permit coverage
180 days before the permit expires, the division is requiring that permittees desiring continued
coverage under this general permit must reapply at least 90 days in advance of this permit
expiration. The division will determine if the permittee may continue to discharge stormwater
under the terms of the general permit. An individual permit may be required for any facility not
reauthorized to discharge under the reissued general permit.
If this permit is not reissued or replaced prior to the expiration date, it will be administratively
continued and remain in force and effect. For permittees that have applied for continued permit
coverage, discharges authorized under this permit prior to the expiration date will automatically
remain covered by this permit until the earliest of:
i. An authorization to discharge under a reissued permit, or a replacement of this permit,
following the timely and appropriate submittal of a complete application requesting
authorization to discharge under the new permit and compliance with the requirements of the
new permit; or
ii. The issuance and effect of a termination issued by the division; or
iii. The issuance or denial of an individual permit for the facility’s discharges; or
iv. A formal permit decision by the division not to reissue this general permit, at which time the
division will identify a reasonable time period for covered dischargers to seek coverage under
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Permit No. COR400000
an alternative general permit or an individual permit. Coverage under this permit will cease
when coverage under another permit is granted/authorized; or
v. The division has informed the permittee that discharges previously authorized under this
permit are no longer covered under this permit.
B. EFFLUENT LIMITATIONS
Requirements for Control Measures Used to Meet Effluent Limitations
The permittee must implement control measures to minimize the discharge of pollutants from all
potential pollutant sources at the site. Control measures must be installed prior to commencement of
construction activities. Control measures must be selected, designed, installed and maintained in
accordance with good engineering, hydrologic and pollution control practices . Control measures
implemented at the site must be designed to prevent pollution or degradation of state waters.
a. Stormwater Pollution Prevention
The permittee must implement structural and/or nonstructural control measures that effectively
minimize erosion, sediment transport, and the release of other pollutants related to construction
activity.
i. Control Measures for Erosion and Sediment Control
Control measures for erosion and sediment control may include, but are not limited to,
wattles/sediment control logs, silt fences, earthen dikes, drainage swales, sediment traps,
subsurface drains, pipe slope drains, inlet protection, outlet protection, gabions, sediment basins,
temporary vegetation, permanent vegetation, mulching, geotextiles, sod stabilization, slope
roughening, maintaining existing vegetation, protection of trees, and preservation of mature
vegetation.
Specific control measures must meet the requirements listed below.
Structural and nonstructural vehicle tracking controls shall be implemented to
minimize vehicle tracking of sediment from disturbed areas and may include tracking
pads, minimizing site access, wash racks, graveled parking areas, maintaining vehicle
traffic to paved areas, street sweeping and sediment control measures.
Stormwater runoff from all disturbed areas and soil storage areas must utilize or flow
to one or more control measures to minimize erosion or sediment in the discharge. The
control measure(s) must be selected, designed, installed and adequately sized in
accordance with good engineering, hydrologic and pollution control practices for the
intended application. The control measure(s) must contain or filter flows in order to
prevent the bypass of flows without treatment and must be appropriate for
stormwater runoff from disturbed areas and for the expected flow rate, duration, and
flow conditions (e.g. sheet or concentrated flow).
Selection of control measures should prioritize the use of structural and nonstructural
control measures that minimize the potential for erosion (i.e. covering materials).
Selection should also prioritize phasing construction activities to minimize the amount
of soil disturbance at any point in time throughout the duration of construction.
Outlets that withdraw water from or near the surface shall be installed when
discharging from basins and impoundments, unless infeasible.
Maintain pre-existing vegetation or equivalent control measures for areas within 50
horizontal feet of receiving waters as defined by this permit, unless infeasible.
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Permit No. COR400000
Soil compaction must be minimized for areas where infiltration control measures will
occur or where final stabilization will be achieved through vegetative cover.
Unless infeasible, topsoil shall be preserved for those areas of a site that will utilize
vegetative final stabilization.
Minimize the amount of soil exposed during construction activity, including the
disturbance of steep slopes.
Diversion control measures must minimize soil transport and erosion within the entire
diversion, minimize erosion during discharge, and minimize run-on into the diversion.
The permittee must minimize the discharge of pollutants throughout the installation,
implementation and removal of the diversion. Diversions must meet one or more of the
following conditions:
Lined or piped structures that result in no erosion in all flow conditions.
Diversion channels, berms, and coffer dams must be lined or composed of a
material that minimizes potential for soil loss in the entire wetted perimeter
during anticipated flow conditions (e.g. vegetated swale, non -erosive soil
substrate). The entire length of the diversion channel must be designed with all of
the following considerations: maximum flow velocity for the type of material(s)
exposed to the anticipated flows to ensure that the calculated maximum shear
stress of flows in the channel is not expected to result in physical damage to the
channel or liner and result in discharge of pollutants. Additionally, the conditions
relied on to minimize soil loss must be maintained for the projected life of the
diversion (i.e. a vegetated swale must be limited to a period of time that ensures
vegetative growth, minimizes erosion and maintains stable conditions).
An alternative diversion criteria, approved by the division prior to
implementation. The diversion method must be designed to minimize the
discharge of pollutants and to prevent the potential for pollution or degradation
to state waters as a result of the diverted flow through the diversion structure. In
addition, the alternative diversion method must minimize the discharge of
pollutants throughout the installation, implementation and removal of the
diversion.
ii. Practices for Other Common Pollutants
Bulk storage, individual containers of 55 gallons or greater, for petroleum products and
other liquid chemicals must have secondary containment, or equivalent protection, in
order to contain spills and to prevent spilled material from entering state waters.
Control measures designed for concrete washout waste must be implemented. This
includes washout waste discharged to the ground as authorized under this permit and
washout waste from concrete trucks and masonry operations contained on sit e. The
permittee must ensure the washing activities do not contribute pollutants to
stormwater runoff, or receiving waters in accordance Part I.A.1.b.ii. Discharges that
may reach groundwater must flow through soil that has buffering capacity prior to
reaching groundwater, as necessary to meet the effluent limits in this permit,
including Part I.B.3.a. The concrete washout location must not be located in an area
where shallow groundwater may be present and would result in buffering capacity not
being adequate, such as near natural drainages, springs, or wetlands. This permit
authorizes discharges to the ground of concrete washout waste, but does not authorize
on-site waste disposal per Part I.B.3.d.
In the event that water remains onsite and contains pollutants either from the
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Permit No. COR400000
firefighting activities or picked up from the site (i.e. in a gutter, sediment basin, etc.)
after active emergency response is complete, the permittee must ensure the
remaining water containing pollutants is properly removed and disposed of in order to
minimize pollutants from discharging from the site, unless infeasible.
iii. Stabilization Requirements
The following requirements must be implement ed for each site.
(a) Temporary stabilization must be implemented for earth disturbing activities on any portion
of the site where ground disturbing construction activity has permanently ceased, or
temporarily ceased for more than 14 calendar days. Temporary stabilization methods may
include, but are not limited to, tarps, soil tackifier, and hydroseed. The permittee may
exceed the 14-day schedule when either the function of the specific area of the site
requires it to remain disturbed or physical characteristics of the terrain and climate
prevent stabilization. The SWMP must document the constraints necessitating the
alternative schedule, provide the alternate stabilization schedule, and identify all locations
where the alternative schedule is applicable on the site map. Minimum inspection
frequency and scope, as directed in Part I.D., must be followed for temporarily stabilized
areas.
(b) Final stabilization must be implemented for all construction sites covered under this
permit. Final stabilization is reached when (1), (2), and (3) below are complete:
(1) All construction activities are complete.
(2) Permanent stabilization methods are complete. Permanent stabilization methods
include, but are not limited to, permanent pavement or concrete, hardscape,
xeriscape, stabilized driving surfaces, vegetative cover, or equivalent permanent
alternative stabilization methods. The division may approve alternative final
stabilization criteria for specific operations. Vegetative cover must meet the
following criteria:
a. Evenly distributed perennial vegetation, and
b. Coverage, at a minimum, equal to 70 percent of what would have been
provided by native vegetation in a local, undisturbed area or adequate
reference site, and
The permittee must ensure all temporary control measures ar e removed from the
construction site once final stabilization is achieved, except when the control
measure specifications allow the control measure to be left in place (i.e. bio-
degradable control measures).
Final stabilization must be designed and installed as a permanent feature. Final
stabilization measures for obtaining a vegetative cover or alternative stabilization methods
include, but are not limited to, the following as appropriate:
Seed mix selection and application methods;
Soil preparation and amendments;
Soil stabilization methods to provide adequate protection to minimize erosion
(e.g. crimped straw, hydro mulch or rolled erosion control products);
Appropriate sediment control measures as needed until final stabilization is
achieved;
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Permanent pavement, hardscape, xeriscape, stabilized driving surfaces;
Other alternative stabilization practices as applicable.
b. Maintenance
The permittee must ensure that all control measures remain in effective operating condition and
are protected from activities that would reduce their effectiveness. Control measures must be
maintained in accordance with good engineering, hydrologic and pollution control practices.
Observations leading to the required maintenance of control measures can be made during a site
inspection, or during general observations of site conditions. The necessary repairs or modifications
to a control measure requiring routine maintenance, as defined in Part I.E., must be conducted to
maintain an effective operating condition. This section is not subject to the requirements in Part
I.B.1.c below.
c. Corrective Actions
The permittee must assess the adequacy of control measures at the site, and the need for changes
to those control measures, to ensure continued effective performance.
When an inadequate control measure, as defined in Part I.E., is identified (i.e., new or
replacement control measures become necessary), the following corrective action requirements
apply. The permittee is in noncompliance with the permit until the inadequate control measure is
replaced or corrected and returned to effective operating condition in compliance with Part I.B.1
and the general requirements in Part I.B.3. If the inadequate control measure results in
noncompliance that meets the conditions of Part II.L., the permittee must also meet the
requirements of that section.
i. The permittee must take all necessary steps to minimize or prevent the discharge of pollutants
from the permitted area and manage any stormwater run-on onto the site until a control
measure is implemented and made operational and/or an inadequate control measure is
replaced or corrected and returned to effective operating condition. If it is infeasible to install
or repair the control measure immediately after discovering the deficiency, the following must
be documented in the SWMP in Part I.D.5.c and kept on record in accordance with the
recordkeeping requirements in Part II.
(a) Describe why it is infeasible to initiate the installation or repair immediately; and
(b) Provide a schedule for installing or repairing the control measure and returning it to an
effective operating condition as soon as possible.
ii. If applicable, the permittee must remove and properly dispose of any unauthorized release or
discharge within and from the permitted area (e.g., discharge of non-stormwater, untreated
stormwater containing pollutants, spill, or leak not authorized by this permit.) The permittee
must also clean up any contaminated surfaces, if feasible, to minimize discharges of the
material in subsequent storm events, including water remaining from the response that
contains pollutants after active emergency firefighting response is complete.
Discharges to an Impaired Waterbody
a. Total Maximum Daily Load (TMDL)
If the discharge from the site of permit coverage flows to or could reasonably be expected to flow
to any water body for which a TMDL has been approved, and stormwater discharges associated with
construction activity were assigned a pollutant-specific Wasteload Allocation (WLA) under the
TMDL, the division may:
i. Ensure the WLA is implemented properly through alternative local requirements, such as by a
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municipal stormwater permit; or
ii. Notify the permittee of the WLA and amend the permittee’s certification to add specific
effluent limits and other requirements, as appropriate. The permittee may be required to do
the following:
Under the permittee’s SWMP, implement specific control measures based on
requirements of the WLA, and evaluate whether the requirements are met through
implementation of existing stormwater control measures or if additional control
measures are necessary. Document the calculations or other evidence demonstrating
that the requirements are expected to be met; and
If the evaluation shows that additional or modified control measures are necessary,
describe the type and schedule for the control measure additions or modifications.
iii. Discharge monitoring may also be required. The permittee may maintain coverage under the
general permit provided they comply with the applicable requirements outlined above. The
division reserves the right to require individual or alternate general permit coverage.
General Requirements
a. Discharges authorized by this permit shall not cause, have the reasonable potential to cause, or
measurably contribute to an exceedance of any applicable water quality standard, including
narrative standards for water quality.
b. The division may require sampling and testing, on a case -by-case basis, in the event that there is
reason to suspect that the SWMP is not adequately minimizing pollutants in stormwater or in order
to measure the effectiveness of the control measures in removing pollutants in the effluent. Such
monitoring may include Whole Effluent Toxicity testing.
c. The permittee must comply with the lawful requirements of federal agencies, municipalities,
counties, drainage districts and other local agencies including applicable requirements in Municipal
Stormwater Management Programs developed to comply with CDPS permits. The permittee must
comply with local stormwater management requirements, policies and guidelines including those
for erosion and sediment control.
d. All construction site wastes must be properly managed to prevent potential pollution of state
waters. This permit does not authorize on-site waste disposal.
e. This permit does not relieve the permittee of the reporting requirements in 40 CFR 110, 40 CFR 117
or 40 CFR 302. Any discharge of hazardous material must be handled in accordance with the
division's Noncompliance Notification Requirements (see Part II.L of the permit).
C. STORMWATER MANAGEMENT PLAN (SWMP) REQUIREMENTS
SWMP General Requirements
a. A SWMP shall be developed for each construction site listed under Part I.A.3.a, including but not
limited to, construction activity that will disturb one acre or more and/or are part of a common
plan of development or sale covered by this permit. The SWMP must be prepared in accordance
with good engineering, hydrologic and pollution control practices.
i. For public emergency related sites, a SWMP shall be created no later than 14 days after the
commencement of construction activities.
b. The permittee must implement the provisions of the SWMP as written and updated, from
commencement of construction activity until final stabilization is complete. The division may
review the SWMP.
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c. A copy of the SWMP must be retained onsite or be onsite when construction activ ities are occurring
at the site unless the permittee specifies another location and obtains approval from the division.
SWMP Content
a. The SWMP, at a minimum, must include the following elements.
i. Qualified Stormwater Manager. The SWMP must list individual(s) by title and name who are
designated as responsible for implementing the SWMP in its entirety and meet the definition of
a Qualified Stormwater Manager. This role may be filled by more than one individual.
ii. Spill Prevention and Response Plan. The SWMP must have a spill prevention and response plan.
The plan may incorporate by reference any part of a Spill Prevention Control and
Countermeasure (SPCC) plan under section 311 of the Clean Water Act (CWA) or a Spill
Prevention Plan required by a separate CDPS permit. The relevant sections of any referenced
plans must be available as part of the SWMP consistent with Part I.C.4.
iii. Other CDPS Permits. The SWMP must list the applicable CDPS permits associated with the
permitted site and the activities occurring on the permitted site (e.g. a CDPS Dewatering
Permit).
iv. Materials Handling. The SWMP must describe handling procedures of all control measures
implemented at the site to minimize impacts from handling significant materials that could
contribute pollutants to runoff. These handling procedures can include control measures for
pollutants and activities such as, exposed storage of building ma terials, paints and solvents,
landscape materials, fertilizers or chemicals, sanitary waste material, trash and equipment
maintenance or fueling procedures.
v. Potential Sources of Pollution. The SWMP must list all potential sources of pollution which may
reasonably be expected to affect the quality of stormwater discharges associated with
construction activity from the site. This may include, but is not limited to, the following
pollutant sources:
Disturbed and stored soils;
Vehicle tracking of sediments;
Management of contaminated soils, if known to be present, or if contaminated soils
are found during construction;
Loading and unloading operations;
Outdoor storage activities (erodible building materials, fertilizers, chemicals, etc.);
Vehicle and equipment maintenance and fueling;
Significant dust or particulate generating processes (e.g., saw cutting material,
including dust);
Routine maintenance activities involving fertilizers, pesticides, herbicides, detergents,
fuels, solvents, oils, etc.;
On-site waste management practices (waste piles, liquid wastes, dumpsters);
Concrete truck/equipment washing, including washing of the concrete truck chute and
associated fixtures and equipment;
Dedicated asphalt, concrete batch plants and masonry mixing stations;
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Non-industrial waste sources such as worker trash and portable toilets.
vi. Implementation of Control Measures. The SWMP must include design specifications that contain
information on the implementation of all the structural and nonstructural control measures in
use on the site in accordance with good engineering, hydrologic and pollution control
practices; including, as applicable, drawings, dimensions, installation information, materials,
implementation processes, control measure-specific inspection expectations, and maintenance
requirements.
The SWMP must include a documented use agreement between the permittee and the owner or
operator of any control measures located outside of the permitted area, that are utilized by
the permittee’s construction site for compliance with this permit, but not under the direct
control of the permittee. The permittee is responsible for ensuring that all control measures
located outside of their permitted area, that are being utilized by the pe rmittee’s construction
site, are properly maintained and in compliance with all terms and conditions of the permit.
The SWMP must include all information required of and relevant to any such control measures
located outside the permitted area, including location, installation specifications, design
specifications and maintenance requirements.
vii. Site Description. The SWMP must include a site description which includes, at a minimum, the
following:
The nature of the construction activity at the site;
The proposed schedule for the sequence for major construction activities and the
planned implementation of control measures for each phase. (e.g. clearing, grading,
utilities, vertical, etc.);
Estimates of the total acreage of the site, and the acreage expected to be disturbed
by clearing, excavation, grading, or any other construction activities;
A summary of any existing data and sources used in the development of the
construction site plans or SWMP that describe the soil types found in the permitted
area and the erodibility of the identified soil types;
A description of the percent cover of native vegetation on the site if the site is
undisturbed, or the percent cover of native vegetation in a similar, local undisturbed
area or adequate reference area if the site is disturbed. Include the source or
methodology for determining the percentage. If a percent cover is not appropriate for
the site location (i.e. arid), describe the technique and justification for the identified
cover of native vegetation;
A description of any allowable non-stormwater discharges at the site, including those
being discharged under a separate CDPS permit or a division low risk discharge
guidance policy, and applicable control measures installed;
A description of the drainage patterns from the site, including a description of the
immediate source receiving the discharge and the receiving water(s) of the discharge,
if different than the immediate source. If the stormwater discharge is to a municipal
separate storm sewer system, include the name of the entity owning that system, the
location(s) of the stormwater discharge, and the receiving water(s);
A description of all stream crossings located within the construction site boundary ; and
A description of the alternate temporary stabilization schedule, if applicable (Part
I.B.1.a.iii(a)).
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A description of the alternative diversion criteria as approved by the division, if
applicable (Part I.B.1.a.i(i)(3)).
viii. Site Map. The SWMP must include a site map which includes, at a minimum, the following:
Construction site boundaries;
Flow arrows that depict stormwater flow directions on-site and runoff direction;
All areas of ground disturbance including areas of borrow and fill;
Areas used for storage of soil;
Locations of all waste accumulation areas, including areas for liquid, concrete,
masonry, and asphalt;
Locations of dedicated asphalt, concrete batch plants and masonry mixing stations;
Locations of all structural control measures;
Locations of all non-structural control measures (e.g. temporary stabilization);
Locations of springs, streams, wetlands, diversions and other state waters, including
areas that require pre-existing vegetation be maintained within 50 feet of a receiving
water, where determined feasible in accordance with Part I.B.1.a.i(e);
Locations of all stream crossings located within the construction site boundary; and
Locations where alternative temporary stabilization schedules apply.
ix. Temporary Stabilization, Final Stabilization and Long Term Stormwater Management.
The SWMP must document the constraints necessitating an alternative temporary
stabilization schedule, as referenced in Part I.B.1.a.iii(a), provide the alternate
stabilization schedule, and identify all locations where the alternative schedule is
applicable on the site map.
The SWMP must describe and locate the methods used to achieve final stabilization of
all disturbed areas at the site, as listed in Part I.B.1.a.iii(b).
The SWMP must describe the measures used to establish final stabilization through
vegetative cover or alternative stabilization method, as referenced in Part
I.B.1.a.iii(c), and describe and locate any temporary control measures in place during
the process of final stabilization.
The SWMP must describe and locate any planned permanent control measures to
control pollutants in stormwater discharges that will occur after construction
operations are completed, including but not limited to, detention/retention ponds,
rain gardens, stormwater vaults, etc.
x. Inspection Reports. The SWMP must include documented inspection reports in accordance with
Part I.D.5.c.
SWMP Review and Revisions
Permittees must keep a record of SWMP changes made that includes the date and identification of the
changes. The SWMP must be amended when the following occurs:
a. A change in design, construction, operation, or maintenance of the site requiring implementation
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of new or revised control measures;
b. The SWMP proves ineffective in controlling pollutants in stormwater runoff in compliance with the
permit conditions;
c. Control measures identified in the SWMP are no longer necessary and are removed; and
d. Corrective actions are taken onsite that result in a change to the SWMP.
e. The site or areas of the site qualifying for reduced frequency inspections under Part I.D.4.
For SWMP revisions made prior to or following a change(s) onsite, including revisions to sections
addressing site conditions and control measures, a notation must be included in the SWMP that identifi es
the date of the site change, the control measure removed, or modified, the location(s) of those control
measures, and any changes to the control measure(s). The permittee must ensure the site changes are
reflected in the SWMP. The permittee is noncompliant with the permit until the SWMP revisions have
been made.
SWMP Availability
A copy of the SWMP must be provided upon request to the division, EPA, and any local agency with
authority for approving sediment and erosion plans, grading plans or stormwater management plans
within the time frame specified in the request. If the SWMP is required to be submitted to any of these
entities, the submission must include a signed certification in accordance with Part I.A.3.e, certifying
that the SWMP is complete and compliant with all terms and conditions of the permit.
All SWMPs required under this permit are considered reports that must be available to the public under
Section 308(b) of the CWA and Section 61.5(4) of the CDPS regulati ons. The permittee must make plans
available to members of the public upon request. However, the permittee may claim any portion of a
SWMP as confidential in accordance with 40 CFR Part 2.
D. SITE INSPECTIONS
Site inspections must be conducted in accordance with the following requirements. The required inspection
schedules are a minimum frequency and do not affect the permittee’s responsibility to implement control
measures in effective operating condition as prescribed in the SWMP, Part I.C.2.a.vi, as proper maintenance of
control measures may require more frequent inspections. Site inspections shall start within 7 calendar days of
the commencement of construction activities on site.
Person Responsible for Conducting Inspections
The person(s) inspecting the site may be on the permittee’s staff or a third party hired to conduct
stormwater inspections under the direction of the permittee(s). The permittee is responsible for
ensuring that the inspector meets the definition of a Qualified Stormwater Manager. The inspector may
be different than the individual(s) listed in Part I.C.2.a.i.
Inspection Frequency
Permittees must conduct site inspections in accordance with on the following minimum frequencies,
unless the site meets the requirements of Part I.D.3. All inspections must be recorded per Part I.D.5.c.
a. At least one inspection every 7 calendar days; or
b. At least one inspection every 14 calendar days, if post-storm event inspections are conducted
within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion.
Post-storm inspections may be used to fulfill the 14-day routine inspection requirement.
c. When site conditions make the schedule required in this section impractical, the permittee may
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petition the division to grant an alternate inspection schedule. The alternative inspection schedule
must not be implemented prior to written approval by the divisio n and incorporation into the
SWMP.
Inspection Frequency for Discharges to Outstanding Waters
Permittees must conduct site inspections at least once every 7 calendar days for sites that discharge to
a water body designated as an Outstanding Water by the Water Quality Control Commission.
Reduced Inspection Frequency
The permittee may perform site inspections at the following reduced frequencies when one of the
following conditions exists:
a. Post-Storm Inspections at Temporarily Idle Sites
For permittees choosing an inspection frequency pursuant to Part I.D.2.b and if no construction
activities will occur following a storm event, post-storm event inspections must be conducted prior
to re-commencing construction activities, and no later than 72 hours following the storm event. If
the post-storm event inspection qualifies under this section, the inspection delay must be
documented in the inspection record per Part I.D.5.c. Routine inspections must still be conducted
at least every 14 calendar days.
b. Inspections at Completed Sites/Areas
When the site, or portions of a site, are awaiting establishment of a vegetative ground cover and
final stabilization, the permittee must conduct a thorough inspection of the stormwater
management system at least once every 30 days. Post-storm event inspections are not required
under this schedule. This reduced inspection schedule is allowed if all of the following criteria are
met:
i. All construction activities resulting in ground disturbance are complete;
ii. All activities required for final stabilization, in accordance with Part I.B.1.a.iii(b) & (c) and
with the SWMP, have been completed, with the exception of the application of seed that has
not occurred due to seasonal conditions or the necessity for additional seed application to
augment previous efforts; and
iii. The SWMP has been amended to locate those areas to be inspected in accordance with the
reduced schedule allowed for in this paragraph.
c. Winter Conditions Inspections Exclusion
Inspections are not required for sites that meet all of the following conditions: construction
activities are temporarily halted, snow cover exists over the entire site for an extended period, and
melting conditions posing a risk of surface erosion do not exist. This inspection exception is
applicable only during the period where melting conditions do not exist, and applies to the routine
7-day, 14-day and monthly inspections, as well as the post-storm-event inspections. When this
inspection exclusion is implemented, the following information must be documented in accordance
with the requirements in Part I.C.3 and Part I.D.5.c:
i. Dates when snow cover existed;
ii. Date when construction activities ceased; and
iii. Date melting conditions began.
Inspection Scope
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a. Areas to Be Inspected
When conducting a site inspection the following areas, if applicable, must be inspected for
evidence of, or the potential for, pollutants leaving the construction site boundaries, entering the
stormwater drainage system or discharging to state waters:
i. Construction site perimeter;
ii. All disturbed areas;
iii. Locations of installed control measures;
iv. Designated haul routes;
v. Material and waste storage areas exposed to precipitation;
vi. Locations where stormwater has the potential to discharge offsite; and
vii. Locations where vehicles exit the site.
b. Inspection Requirements
i. Visually verify whether all implemented control measures are in effective operational
condition and are working as designed in their specifications to minimize pollutant discharges.
ii. Determine if there are new potential sources of pollutants.
iii. Assess the adequacy of control measures at the site to identify areas requiring new or modif ied
control measures to minimize pollutant discharges.
iv. Identify all areas of non–compliance with the permit requirements and, if necessary,
implement corrective action(s) in accordance with Part I.B.1.c.
c. Inspection Reports
The permittee must keep a record of all inspections conducted for each permitted site. Inspection
reports must identify any incidents of noncompliance with the terms and conditions of this permit.
All inspection reports must be signed and dated in accordance with Part I.A.3.f. Inspection records
must be retained in accordance with Part II.O. At a minimum, the inspection report must include:
i. The inspection date;
ii. Name(s) and title(s) of personnel conducting the inspection;
iii. Weather conditions at the time of inspection;
iv. Phase of construction at the time of inspection;
v. Estimated acreage of disturbance at the time of inspection;
vi. Location(s) and identification of control measures requiring routine maintenance;
vii. Location(s) and identification of discharges of sediment or other pollutants from the site;
viii. Location(s) and identification of inadequate control measures;
ix. Location(s) and identification of additional control measures needed that were not in pl ace at
the time of inspection;
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x. Description of corrective action(s) for items vii, viii, ix, above, dates corrective action(s) were
completed, including requisite changes to the SWMP, as necessary;
xi. Description of the minimum inspection frequency (either in accordance with Part I.D.2, Part
I.D.3 or Part I.D.4.) utilized when conducting each inspection.
xii. Deviations from the minimum inspection schedule as required i n Part I.D.2. This would include
documentation of division approval for an alternate inspection schedule outlined in Part
I.D.2.c;
xiii. After adequate corrective action(s) have been taken, or where a report does not identify any
incidents requiring corrective action, the report shall contain a statement as required in Part
I.A.3.f.
E. DEFINITIONS
For the purposes of this permit:
(1) Bypass the intentional diversion of waste streams from any portion of a treatment facility in
accordance with 40 CFR 122.41(m)(1)(i) and Regulation 61.2(12).
(2) Common Plan of Development or Sale - A contiguous area where multiple separate and distinct
construction activities may be taking place at different times on different schedules, but remain
related. The division has determined that “contiguous” means construction activities located in
close proximity to each other (within ¼ mile). Construction activities are considered to be “related”
if they share the same development plan, builder or contractor, equipment, storage areas, etc.
“Common plan of development or sale” includes construction activities that are associated with the
construction of field wide oil and gas permits for facilities that are related.
(3) Construction Activity - Ground surface disturbing and associated activities (land disturbance), which
include, but are not limited to, clearing, grading, excavation, demolition, installation of new or
improved haul roads and access roads, staging areas, stockpiling of fill materials, and borrow areas.
Construction does not include routine maintenance to maintain the original line and grade, hydraulic
capacity, or original purpose of the facility. Activities to conduct repairs that are not part of routine
maintenance or for replacement are construction activities and are not routine maintenance.
Repaving activities where underlying and/or surrounding soil is exposed as part of the repaving
operation are considered construction activities. Construction activity is from initial ground breaking
to final stabilization regardless of ownership of the construction activities.
(4) Control Measure - Any best management practice or other method used to prevent or reduce the
discharge of pollutants to state waters. Control measures include, but are not limited to, best
management practices. Control measures can include other methods such as the installation,
operation, and maintenance of structural controls and treatment devices.
(5) Control Measure Requiring Routine Maintenance - Any control measure that is still operating in
accordance with its design and the requirements of this permit, but requires maintenance to
prevent a breach of the control measure. See also inadequate control measure.
(6) Dedicated Asphalt, Concrete Batch Plants and Masonry Mixing Stations – Are batch plants or mixing
stations located on, or within ¼ mile of, a construction site and that provide materials only to that
specific construction site.
(7) Diversion – Discharges of state waters that are temporarily routed through channels or structures
(e.g. in-stream, uncontaminated springs, non-pumped groundwater, temporary rerouting of surface
waters).
(8) Final Stabilization - The condition reached when construction activities at the site have been
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completed, permanent stabilization methods are complete, and temporary control measures are
removed. Areas being stabilized with a vegetative cover must have evenly distributed perennial
vegetation. The vegetation coverage must be, at a minimum, equal to 70 percent of what would
have been provided by native vegetation in a local, undisturbed area or adequate reference site.
(9) Good Engineering, Hydrologic and Pollution Control Practices: are methods, procedures, and
practices that:
a. Are based on basic scientific fact(s).
b. Reflect best industry practices and standards.
c. Are appropriate for the conditions and pollutant sources.
d. Provide appropriate solutions to meet the associated permit requirements, including
practice based effluent limits.
(10) Inadequate Control Measure - Any control measure that is not designed or implemented in
accordance with the requirements of the permit and/or any control measure that is not
implemented to operate in accordance with its design. See also Control Measure R equiring Routine
Maintenance.
(11) Infeasible – Not technologically possible, or not economically practicable and achievable in light of
best industry practices.
(12) Minimize - reduce or eliminate to the extent achievable using control measures that are
technologically available and economically practicable and achievable in light of best industry
practice.
(13) Municipality - A city, town, county, district, association, or other public body created by, or under,
State law and having jurisdiction over disposal of sewage, industrial wastes, or other wastes, or a
designated and approved management agency under section 208 of CWA (1987).
(14) Municipal Separate Storm Sewer System (MS4) - A conveyance or system of conveyances (including
roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made
channels, or storm drains):
a. Owned or operated by a State, city, town, county, district, association, or other public
body (created by or pursuant to State law) having jurisdiction over disposal of sewage,
industrial wastes, stormwater, or other wastes, including special districts under State
law such as a sewer district, flood control district or drainage district, or similar entity,
or a designated and approved management agency under section 2 08 of the CWA that
discharges to state waters;
i. Designed or used for collecting or conveying stormwater;
ii. Are not a combined sewer; and
iii. Are not part of a Publicly Owned Treatment Works (POTW). See 5 CCR 1002-
61.2(62).
(15) Municipal Stormwater Management Program - A stormwater program operated by a municipality,
typically to meet the requirements of the municipalities MS4 discharge certification.
(16) Operator - The party that has operational control over day -to-day activities at a project site which
are necessary to ensure compliance with the permit. This party is authorized to direct individuals at
a site to carry out activities required by the permit (i.e. the general contractor).
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(17) Outstanding Waters - Waters designated as outstanding waters pursuant to Regulation 31, Section
31.8(2)(a). The highest level of water quality protection applies to certain waters that constitute an
outstanding state or national resource.
(18) Owner - The party that has overall control of the activities and that has funded the implementation
of the construction plans and specifications. This is the party that may have ownership of, a long
term lease of, or easements on the property on which the construction activity is occurring (e.g. the
developer).
(19) Permittee(s) - The owner and operator named in the discharge certification issued under this permit
for the construction site specified in the certification.
(20) Point Source - Any discernible, confined, and discrete conveyance, including, but not limited to, any
pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated
animal feeding operation, or vessel or other floating craft, from which pollutants are or may be
discharged. Point source does not include irrigation return flow. See 5 CCR 102-61.2(75).
(21) Pollutant - Dredged spoil, dirt, slurry, solid waste, incinerator residue, sewage, sewage sludge,
garbage, trash, chemical waste, biological nutrient, biological material, radioactive material, heat,
wrecked or discarded equipment, rock, sand, or any industrial, municipal or agricultural waste. See
5 CCR 1002-61.2(76).
(22) Presentation of credentials – a government issued form of identification, if in person; or (ii)
providing name, position and purpose of inspection if request to enter is made via telephone, email
or other form of electronic communication. A Permittee’s non-response to a request to enter upon
presentation of credentials constitutes a denial to such request, and may result in violation of the
Permit.
(23) Process Water - Any water which, during manufacturing or processing, comes into contact with or
results from the production of any raw material, intermediate product, finished product, by product
or waste product.
(24) Public Emergency Related Site - a project initiated in response to an unanticipated emergency (e.g.,
mud slides, earthquake, extreme flooding conditions, disruption in essential public services), for
which the related work requires immediate authorization to avoid imminent endangerment to
human health or the environment, or to reestablish essential public services.
(25) Qualified Stormwater Manager - An individual knowledgeable in the principles and practices of
erosion and sediment control and pollution prevention, and with the skills to assess conditions at
construction sites that could impact stormwater quality and to assess the effectiveness of
stormwater controls implemented to meet the requirements of this permit.
(26) Qualifying Local Program - A municipal program for stormwater discharges associated with small
construction activity that was formally approved by the division as a qualifying local program.
(27) Receiving Water - Any classified or unclassified surface water segment (including tributaries) in the
State of Colorado into which stormwater associated with construction activities discharges . This
definition includes all water courses, even if they are usually dry, such as borrow ditches, arroyos,
and other unnamed waterways.
(28) Severe Property Damage - substantial physical damage to property, damage to the treatment
facilities which causes them to become inoperable, or substantial and permanent loss of natural
resources which can reasonably be expected to occur in the absence of a bypass. Severe property
damage does not mean economic loss caused by delays in production. See 40 CFR 122.41(m)(1)(ii).
(29) Significant Materials - Include, but not limited to, raw materials; fuels; materials such as solvents,
detergents, and plastic pellets; finished materials such as metallic products; raw materials used in
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food processing or production; hazardous substances designated under section 101(14) of CERCLA;
any chemical the permittee is required to report under section 313 of Title III of the Superfund
Amendments and Reauthorization Act (SARA); fertilizers; pesticides; and waste products such as
ashes, slag and sludge that have the potential to be released with stormwater discharges.
(30) Small Construction Activity - The discharge of stormwater from construction activities that result in
land disturbance of equal to, or greater than, one acre and less than fiv e acres. Small construction
activity also includes the disturbance of less than one acre of total land area that is part of a larger
common plan of development or sale, if the larger common plan ultimately disturbs equal to, or
greater than, one acre and less than five acres.
(31) Spill - An unintentional release of solid or liquid material which may pollute state waters.
(32) State Waters - means any and all surface and subsurface waters which are contained in or flow in or
through this state, but does not include waters in sewage systems, waters in treatment works of
disposal systems, waters in potable water distribution systems, and all water withdrawn for use until
use and treatment have been completed.
(33) Steep Slopes: where a local government, or industry technical manual (e.g. stormwater BMP manual)
has defined what is to be considered a “steep slope”, this permit’s definition automatica lly adopts
that definition. Where no such definition exists, steep slopes are automatically defined as those that
are 3:1 or greater.
(34) Stormwater - Precipitation runoff, snow melt runoff, and surface runoff and drainage. See 5 CCR
1002-61.2(103).
(35) Total Maximum Daily Loads (TMDLs) -The sum of the individual wasteload allocations (WLA) for point
sources and load allocations (LA) for nonpoint sources and natural background. For the purposes of
this permit, a TMDL is a calculation of the maximum amount of a pollutant that a waterbody can
receive and still meet water quality standards, and an allocation of that amount to the pollutant's
sources. A TMDL includes WLAs, LAs, and must include a margin of safety (MOS), and account for
seasonal variations. See section 303(d) of the CWA and 40 C.F.R. 130.2 and 130.7.
(36) Upset - an exceptional incident in which there is unintentional and temporary noncompliance with
permit effluent limitations because of factors beyond the reasonable control of the permittee. An
upset does not include noncompliance to the extent caused by operational error, improperly
designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or
careless or improper operation in accordance with 40 CFR 122.41(n) and Regula tion 61.2(114).
F. MONITORING
The division may require sampling and testing, on a case-by-case basis. If the division requires sampling and
testing, the division will send a notification to the permittee. Reporting procedures for any monitoring data
collected will be included in the notification.
If monitoring is required, the following applies:
1. The thirty (30) day average must be determined by the arithmetic mean of all samples collected
during a thirty (30) consecutive-day period; and
2. A grab sample, for monitoring requirements, is a single “dip and take” sample.
G. OIL AND GAS CONSTRUCTION
Stormwater discharges associated with construction activities directly related to oil and gas exploration,
production, processing, and treatment operatio ns or transmission facilities are regulated under the Colorado
Discharge Permit System Regulations (5 CCR 1002 -61), and require coverage under this permit in accordance
with that regulation. However, references in this permit to specific authority under th e CWA do not apply to
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stormwater discharges associated with these oil and gas related construction activities, to the extent that the
references are limited by the federal Energy Policy Act of 2005.
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Part II: Standard Permit Conditions
A. DUTY TO COMPLY
The permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a
violation of the Water Quality Control Act and is grounds for:
1. Enforcement action;
2. Permit termination, revocation and reissuance, or modification; or
3. Denial of a permit renewal application.
B. DUTY TO REAPPLY
If the permittee wishes to continue an activity regulated by this permit after the expiration date of this
permit, the permittee must apply for and obtain authorization as required by Part I.A.3.k. of the permit.
C. NEED TO HALT OR REDUCE ACTIVITY NOT A DEFENSE
It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the conditions of this permit.
D. DUTY TO MITIGATE
A permittee must take all reasonable steps to minimize or prevent any discharge in violation of this permit
which has a reasonable likelihood of adversely affecting human health or the environment.
E. PROPER OPERATION AND MAINTENANCE
A permittee must at all times properly operate and maintain all facilities and systems of treatment and control
(and related appurtenances) that are installed or used by the permittee to achieve compliance with the
conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and
appropriate quality assurance procedures. This provision requires the operation of backup or auxiliary facilities
or similar systems which are installed by the permittee only when the operat ion is necessary to achieve
compliance with the conditions of this permit. This requirement can be met by meeting the requirements for
Part I.B., I.C., and I.D. above. See also 40 C.F.R. § 122.41(e).
F. PERMIT ACTIONS
This permit may be modified, revoked and reissued, or terminated for cause. The permittee request for a
permit modification, revocation and reissuance, or termination, or a notification of planned changes or
anticipated noncompliance does not stay any permit condition. Any request for modificatio n, revocation,
reissuance, or termination under this permit must comply with all terms and conditions of Regulation 61.8(8).
G. PROPERTY RIGHTS
In accordance with 40 CFR 122.41(g) and 5 CCR 1002 -61, 61.8(9):
1. The issuance of a permit does not convey any property or water rights in either real or personal
property, or stream flows or any exclusive privilege.
2. The issuance of a permit does not authorize any injury to person or property or any invasion of
personal rights, nor does it authorize the infringement of f ederal, state, or local laws or regulations.
3. Except for any toxic effluent standard or prohibition imposed under Section 307 of the Federal act or
any standard for sewage sludge use or disposal under Section 405(d) of the Federal act, compliance
with a permit during its term constitutes compliance, for purposes of enforcement, with Sections 301,
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302, 306, 318, 403, and 405(a) and (b) of the Federal act. However, a permit may be modified,
revoked and reissued, or terminated during its term for cause as set f orth in Section 61.8(8) of the
Colorado Discharge Permit System Regulations.
H. DUTY TO PROVIDE INFORMATION
The permittee shall furnish to the division, within a reasonable time, any information which the division may
request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit, or
to determine compliance with this permit. The permittee shall also furnish to the division, upon request,
copies of records required to be kept by this permit in accordance with 40 CFR 122.41(h) and/or Regulation
61.8(3)(q).
I. INSPECTION AND ENTRY
The permittee shall allow the division and the authorized representative, upon the presentation of credentials
as required by law, to allow for inspections to be conducted in accordance with 40 CFR 122.41(i), Regulation
61.8(3), and Regulation 61.8(4):
1. To enter upon the permittee's premises where a regulated facility or activity is located or in which any
records are required to be kept under the terms and conditions of this permit;
2. At reasonable times to have access to and copy any records required to be kept under the terms and
conditions of this permit;
3. At reasonable times, inspect any monitoring equipment or mo nitoring method required in the permit;
and
4. To enter upon the permittee's premises in a reasonable manner and at a reasonable time to inspect or
investigate, any actual, suspected, or potential source of water pollution, or any violation of the
Colorado Water Quality Control Act. The investigation may include: sampling of any discharges,
stormwater or process water, taking of photographs, interviewing site staff on alleged violations and
other matters related to the permit, and assessing any and all facilities or areas within the site that
may affect discharges, the permit, or an alleged violation.
The permittee shall provide access to the division or other authorized representatives upon
presentation of proper credentials. A permittee’s non-response to a request to enter upon
presentation of credentials constitutes a denial of such request, and may result in a violation of the
permit.
J. MONITORING AND RECORDS
1. Samples and measurements taken for the purpose of monitoring must be representative of the volume
and nature of the monitored activity.
2. The permittee must retain records of all monitoring information, including all calibration and
maintenance records and all original strip chart recordings for continuous monitoring instrumentation,
copies of all reports required by this permit, and records of all data used to complete the application
for this permit, for a period of at least three years from the date the permit expires or the date t he
permittee’s authorization is terminated. This period may be extended by request of the division at
any time.
3. Records of monitoring information must include:
a. The date, exact place, and time of sampling or measurements;
b. The individual(s) who performed the sampling or measurements;
c. The date(s) analyses were performed
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d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.
4. Monitoring must be conducted according to test procedures approved under 40 CFR Part 136, unless
other test procedures have been specified in the permit.
K. SIGNATORY REQUIREMENTS
Authorization to Sign:
All documents required to be submitted to the division by the permit must be signed in accordance with
the following criteria:
a. For a corporation: by a responsible corporate officer. For the purpose of this subsection, a
responsible corporate officer means:
i. A president, secretary, treasurer, or vice president of the corporation in charge of a principal
business function, or any other person who performs similar policy - or decision-making
functions for the corporation, or
ii. The manager of one or more manufacturing, production, or operating facilities, provided, the
manager is authorized to make management decisions which govern th e operation of the
regulated facility including having the explicit or implicit duty of making major capital
investment recommendations, and initiating and directing other comprehensive measures to
assure long term environmental compliance with environmental laws and regulations; the
manager can ensure that the necessary systems are established or actions taken to gather
complete and accurate information for permit application requirements; and where authority
to sign documents has been assigned or delegate d to the manager in accordance with
corporate procedures.
b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or
c. For a municipality, state, federal, or other public agency: By either a principal executive officer or
ranking elected official. For purposes of this subsection, a principal executive officer of a federal
agency includes
i. The chief executive officer of the agency, or
ii. A senior executive officer having responsibility for the overall operations of a principal
geographic unit of the agency. (e.g. Regional Administrator of EPA)
Electronic Signatures
For persons signing applications for coverage under this permit electronically, in addition to meeting
other applicable requirements stated above, such signatures must meet the sam e signature,
authentication, and identity-proofing standards set forth at 40 CFR § 3.2000(b) for electronic reports
(including robust second-factor authentication). Compliance with this requirement can be achieved by
submitting the application using the Colorado Environmental Online Service (CEOS) system.
Change in Authorization to Sign
If an authorization is no longer accurate because a different individual or position has responsibility for
the overall operation of the facility, a new authorization must be submitted to the division, prior to the
re-authorization, or together with any reports, information, or applications to be signed by an
authorized representative.
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L. REPORTING REQUIREMENTS
Planned Changes
The permittee shall give advance notice to the division, in writing, of any planned physical alterations
or additions to the permitted facility in accordance with 40 CFR 122.41(l) and Regulation 61.8(5)(a).
Notice is required only when:
a. The alteration or addition to a permitted facility may meet one of the criteria for determining
whether a facility is a new source in 40 CFR 122.29(b); or
b. The alteration or addition could significantly change the nature or increase the quantity of
pollutants discharged. This notification applies to pollutants which are subject neither to effluent
limitations in the permit, nor to notification requirements under 40 CFR 122.41(a)(1).
Anticipated Non-Compliance
The permittee shall give advance notice to the division, in writing, of any planned changes in the
permitted facility or activity that may result in noncompliance with permit requirements. The timing of
notification requirements differs based on the type of non-compliance as described in subparagraphs 5,
6, 7, and 8 below.
Transfer of Ownership or Control
The permittee shall notify the division, in writing, ten (10) calendar days in advance of a proposed
transfer of the permit. This permit is not transferable to any person except after notice is given to the
division.
a. Where a facility wants to change the name of the permittee, the original permittee (the first owner
or operators) must submit a Notice of Termination.
b. The new owner or operator must submit an application. See also signature requirements in Pa rt
II.K, above.
c. A permit may be automatically transferred to a new permittee if:
i. The current permittee notifies the division in writing 30 calendar days in advance of the
proposed transfer date; and
ii. The notice includes a written agreement between the existing and new permittee(s)
containing a specific date for transfer of permit responsibility, coverage and liability between
them; and
iii. The division does not notify the existing permittee and the proposed new permittee of its
intent to modify, or revoke and reissue the permit.
iv. Fee requirements of the Colorado Discharge Permit System Regulations, Section 61.15, have
been met.
Monitoring reports
Monitoring results must be reported at the intervals specified in this permit per the requirements of 40
CFR 122.41(l)(4).
Compliance Schedules
Reports of compliance or noncompliance with, or any progress reports on, interim and final
requirements contained in any compliance schedule in the permit, shall be submitted on the date listed
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in the compliance schedule section. The fourteen (14) calendar day provision in Regulation 61.8(4)(n)(i)
has been incorporated into the due date.
Twenty-four Hour Reporting
In addition to the reports required elsewhere in this permit, the permittee shall report the following
circumstances orally within twenty-four (24) hours from the time the permittee becomes aware of the
circumstances, and shall mail to the division a written report containing the information requested
within five (5) working days after becoming aware of the following c ircumstances:
a. Circumstances leading to any noncompliance which may endanger health or the environment
regardless of the cause of the incident;
b. Circumstances leading to any unanticipated bypass which exceeds any effluent limitations in the
permit;
c. Circumstances leading to any upset which causes an exceedance of any effluent limitation in the
permit;
d. Daily maximum violations for any of the pollutants limited by Part I of this permit. This includes any
toxic pollutant or hazardous substance or any pollutant specifically identified as the method to
control any toxic pollutant or hazardous substance.
e. The division may waive the written report required under subparagraph 6 of this section if the oral
report has been received within 24 hours.
Other Non-Compliance
A permittee must report all instances of noncompliance at the time monitoring reports are due. If no
monitoring reports are required, these reports are due at least annually in accordance with Regulation
61.8(4)(p). The annual report must contain all instances of non-compliance required under either
subparagraph 5 or subparagraph 6 of this subsection.
Other Information
Where a permittee becomes aware that it failed to submit any relevant facts in a permit application, or
submitted incorrect information in a permit application, or in any report to the Permitting Authority, it
has a duty to promptly submit such facts or information.
M. BYPASS
Bypass Not Exceeding Limitations
The permittees may allow any bypass to occur which does not cause effluent limitations to be
exceeded, but only if it also is for essential maintenance to assure efficient operation. These bypasses
are not subject to the provisions of Part II.M.2 of this permit. See 40 CFR 122.41(m)(2).
Notice of Bypass
a. Anticipated bypass. If the permittee knows in advance of the need for a bypass, the permittee must
submit prior notice, if possible at least ten days before the date of the bypass. ee 40 CFR
§122.41(m)(3)(i) and/or Regulation 61.9(5)(c).
b. Unanticipated bypass. The permittee must submit notice of an unanticipated bypass in accordance
with Part II.L.6. See 40 CFR §122.41(m)(3)(ii).
Prohibition of Bypass
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Bypasses are prohibited and the division may take enforcement action against the permittee for bypass,
unless:
a. The bypass is unavoidable to prevent loss of life, personal injury, or severe property damage;
b. There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities,
retention of untreated wastes, or maintenance during normal periods of equipment downtime. This
condition is not satisfied if adequate backup equipment should have been installed in the exercise
of reasonable engineering judgment to prevent a bypass which occurred during norma l periods of
equipment downtime or preventive maintenance; and
c. Proper notices were submitted to the division.
N. UPSET
Effect of an upset
An upset constitutes an affirmative defense to an action brought for noncompliance with permit effluent
limitations if the requirements of Part II.N.2. of this permit are met. No determination made during
administrative review of claims that noncompliance was caused by upset, and before an action for
noncompliance, is final administrative action subject to judicial review in accordance with Regulation
61.8(3)(j).
Conditions Necessary for Demonstration of an Upset
A permittee who wishes to establish the affirmative defense of upset shall demonstrate through
properly signed contemporaneous operating logs, or other relevant evid ence that:
a. An upset occurred and the permittee can identify the specific cause(s) of the upset;
b. The permitted facility was at the time being properly operated and maintained; and
c. The permittee submitted proper notice of the upset as required in Part II.L.6.(24- hour notice); and
d. The permittee complied with any remedial measure necessary to minimize or prevent any discharge
or sludge use or disposal in violation of this permit which has a reasonable likelihood of adversely
affecting human health or the environment. In addition to the demonstration required above, a
permittee who wishes to establish the affirmative defense of upset for a violation of effluent
limitations based upon water quality standards shall also demonstrate through monitoring,
modeling or other methods that the relevant standards were achieved in the receiving water.
Burden of Proof
In any enforcement proceeding, the permittee seeking to establish the occurrence of an upset has the
burden of proof.
O. RETENTION OF RECORDS
Post-Expiration or Termination Retention
Copies of documentation required by this permit, including records of all data used to complete the
application for permit coverage to be covered by this permit, must be retained for at least three years
from the date that permit coverage expires or is terminated. This period may be extended by request of
EPA at any time.
On-site Retention
The permittee must retain an electronic version or hardcopy of the SWMP at the construction site from
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the date of the initiation of construction activities to the date of expiration or inactivation of permit
coverage; unless another location, specified by the permittee, is approved by the division.
P. REOPENER CLAUSE
Procedures for Modification or Revocation
Permit modification or revocation of this permit or coverage under this permit will be conducted
according to Regulation 61.8(8).
Water Quality Protection
If there is evidence indicating that the stormwater discharges authorized by this permit cause, have the
reasonable potential to cause or contribute to an excursion above any applicable water quality
standard, the permittee may be required to obtain an individual permit, or the permit may be modified
to include different limitations and/or requirements.
Q. SEVERABILITY
The provisions of this permit are severable. If any provisions or the application of any provision of this permit
to any circumstances, is held invalid, the application of such provision to other circumstances and the
application of the remainder of this permit shall not be affected.
R. NOTIFICATION REQUIREMENTS
Notification to Parties
All notification requirements, excluding information submitted using the CEOS portal, shall be directed
as follows:
a. Oral Notifications, during normal business hours shall be to:
Clean Water Compliance Section
Water Quality Control Division
Telephone: (303) 692-3500
b. Written notification shall be to:
Clean Water Compliance Section
Water Quality Control Division
Colorado Department of Public Health and Environment
WQCD-WQP-B2
4300 Cherry Creek Drive South
Denver, CO 80246-1530
S. RESPONSIBILITIES
Reduction, Loss, or Failure of Treatment Facility
The permittee has the duty to halt or reduce any activity if necessary to maintain compliance with the
effluent limitations of the permit. It shall not be a defense for a permittee in an enforcement action
that it would be necessary to halt or reduce the permitted activity in order to maintain compliance with
the conditions of this permit.
T. OIL AND HAZARDOUS SUBSTANCE LIABILITY
Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the
permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject to
under Section 311 (Oil and Hazardous Substance Liability) of the CWA.
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U. EMERGENCY POWERS
Nothing in this permit shall be construed to prevent or limit application of any emergency power of the
division.
V. CONFIDENTIALITY
Any information relating to any secret process, method of manufacture or production, or sal es or marketing
data which has been declared confidential by the permittee, and which may be acquired, ascertained, or
discovered, whether in any sampling investigation, emergency investigation, or otherwise, shall not be publicly
disclosed by any member, officer, or employee of the Water Quality Control Commission or the division, but
shall be kept confidential. Any person seeking to invoke the protection of this section shall bear the burden of
proving its applicability. This section shall never be interpreted as preventing full disclosure of effluent data.
W. FEES
The permittee is required to submit payment of an annual fee as set forth in the 2016 amendments to the
Water Quality Control Act. Section 25-8-502 (1.1) (b), and the Colorado Discharge Permit System Regulations 5
CCR 1002-61, Section 61.15 as amended. Failure to submit the required fee when due and payable is a
violation of the permit and will result in enforcement action pursuant to Section 25 -8-601 et. seq., C.R.S.1973
as amended.
X. DURATION OF PERMIT
The duration of a permit shall be for a fixed term and shall not exceed five (5) years. If the permittee desires
to continue to discharge, a permit renewal application shall be submitted at least ninety (90) calendar days
before this permit expires. Filing of a timely and complete application shall cause the expired permit to
continue in force to the effective date of the new permit. The permit's duration may be extended only through
administrative extensions and not through interim modifications. If th e permittee anticipates there will be no
discharge after the expiration date of this permit, the division should be promptly notified so that it can
terminate the permit in accordance with Part I.A.3.i.
Y. SECTION 307 TOXICS
If a toxic effluent standard or prohibition, including any applicable schedule of compliance specified, is
established by regulation pursuant to Section 307 of the Federal Act for a toxic pollutant which is present in
the permittee's discharge and such standard or prohibition is more stringent than any limitation upon such
pollutant in the discharge permit, the division shall institute proceedings to modify or revoke and reissue the
permit to conform to the toxic effluent standard or prohibition
APPENDIX B
CDHPE Construction Activity Permit Application
For Agency Use Only
Permit Number Assigned
COR03-
Date Received /_ /_
Month Day Year
COLORADO DISCHARGE PERMIT SYSTEM (CDPS)
STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION
PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED.
Please print or type. Original signatures are required. All items must be completed accurately and in their entirety for
the application to be deemed complete. Incomplete applications will not be processed until all information is received
which will ultimately delay the issuance of a permit. If more space is required to answer any question, please attach
additional sheets to the application form. Applications must be submitted by mail or hand delivered to:
Colorado Department of Public Health and Environment
Water Quality Control Division
4300 Cherry Creek Drive South
WQCD-P-B2
Denver, Colorado 80246-1530
Any additional information that you would like the Division to consider in developing the permit should be provided with
the application. Examples include effluent data and/or modeling and planned pollutant removal strategies.
PERMIT INFORMATION
Reason for Application: NEW CERT
RENEW CERT EXISTING CERT #
Applicant is: Property Owner Contractor/Operator
A. CONTACT INFORMATION - NOT ALL CONTACT TYPES MAY APPLY * indicates required
*PERMITTEE (If more than one please add additional pages)
*ORGANIZATION FORMAL NAME:
1) *PERMITTEE the person authorized to sign and certify the permit application. This person receives all
permit correspondences and is legally responsible for compliance with the permit.
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
This form must be signed by the Permittee (listed in item 1) to be considered complete.
Per Regulation 61 In all cases, it shall be signed as follows:
a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible
corporate officer is responsible for the overall operation of the facility from which the discharge described in the
application originates.
b) In the case of a partnership, by a general partner.
c) In the case of a sole proprietorship, by the proprietor.
d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official
page 1 of 5 revised April 2011
2) DMR COGNIZANT OFFICIAL (i.e. authorized agent) the person or position authorized to sign and certify reports required
by the Division including Discharge Monitoring Reports *DMR’s, Annual Reports, Compliance Schedule submittals,
and other information requested by the Division. The Division will transmit pre-printed reports (ie. DMR’s) to this person.
If more than one, please add additional pages. Same As 1) Permittee
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by
the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if:
(i) The authorization is made in writing by the permittee
(ii) The authorization specifies either an individual or a position having responsibility for the overall operation of the
regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent,
position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters
for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a
named position); and
(iii) The written authorization is submitted to the Division
3) *SITE CONTACT local contact for questions relating to the facility & discharge authorized by this permit
for the facility.
Same As 1) Permittee
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
4) * BILLING CONTACT if different than the permittee
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
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5) OTHER CONTACT TYPES (check below) Add pages if necessary:
ResponsiblePosition (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
o Pretreatment
Coordinator
o Environmental Contact
o Biosolids Responsible
Party
o Property Owner
Inspection Facility Contact
Consultant
Compliance Contact
Stormwater MS4 Responsible
Person
Stormwater Authorized
Representative
Other
B. Permitted Project/Facility Information
Project/Facility Name
Street Address or cross streets
(e.g., “S. of Park St. between 5th Ave. and 10th Ave.”, or “W. side of C.R. 21, 3.25 miles N. of Hwy 10”; A street name without an address,
intersection, mile marker, or other identifying information describing the location of the project is not adequate. For linear projects,
the route of the project should be described as best as possible with the location more accurately indicated by a map.)
City, Zip Code County
Facility Latitude/Longitude— (approximate center of site to nearest 15 seconds using one of
following formats
001A Latitude . Longitude . (e.g., 39.703°, 104.933°’)
degrees (to 3 decimal places) degrees (to 3 decimal places)
or
001A Latitude º ’ " Longitude º ’ " (e.g., 39°46'11"N, 104°53'11"W)
degrees minutes seconds degrees minutes seconds
For the approximate center point of the property, to the nearest 15 seconds. The latitude and longitude must be provided as
either degrees, minutes, and seconds, or in decimal degrees with three decimal places. This information may be obtained from
a variety of sources, including:
o Surveyors or engineers for the project should have, or be able to calculate, this information.
o EPA maintains a web-based siting tool as part of their Toxic Release Inventory program that uses interactive maps and
aerial photography to help users get latitude and longitude. The siting tool can be accessed at
www.epa.gov/tri/report/siting_tool/index.htm
o U.S. Geological Survey topographical map(s), available at area map stores.
o Using a Global Positioning System (GPS) unit to obtain a direct reading.
Note: the latitude/longitude required above is not the directional degrees, minutes, and seconds provided on a site legal
description to define property boundaries.
C. MAP (Attachment) If no map is submitted, the permit will not be issued.
Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be
disturbed. Maps must be no larger than 11x17 inches.
D. LEGAL DESCRIPTION
Legal description: If subdivided, provide the legal description below, or indicate that it is not applicable (do not supply
Township/Range/Section or metes and bounds description of site)
Subdivision(s): Lot(s): Block(s):
OR
Not applicable (site has not been subdivided)
page 3 of 5 revised April 2011
E. AREA OF CONSTRUCTION SITE
Total area of project site (acres): Area of project site to undergo disturbance (acres):
Note: aside from clearing, grading and excavation activities, disturbed areas also include areas receiving
overburden (e.g., stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage
that disturb existing vegetative cover
Total disturbed area of Larger Common Plan of Development or Sale, if applicable:
(i.e., total, including all phases, filings, lots, and infrastructure not covered by this application)
Provide both the total area of the construction site, and the area that will undergo disturbance, in acres. Note: aside
from clearing, grading and excavation activities, disturbed areas also include areas receiving overburden (e.g.,
stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage that disturb existing
vegetative cover (see construction activity description under the APPLICABILITY section on page 1).
If the project is part of a larger common plan of development or sale (see the definition under the APPLICABILITY
section on page 1), the disturbed area of the total plan must also be included.
F. NATURE OF CONSTRUCTION ACTIVITY
Check the appropriate box(s) or provide a brief description that indicates the general nature of the construction activities.
(The full description of activities must be included in the Stormwater Management Plan.)
Single Family Residential Development
Multi-Family Residential Development
Commercial Development
Oil and Gas Production and/or Exploration (including pad sites and associated infrastructure)
Highway/Road Development (not including roadways associated with commercial or residential development)
Other – Description:
G. ANTICIPATED CONSTRUCTION SCHEDULE
Construction Start Date: ___________________________ Final Stabilization Date: _____________________________
Construction Start Date - This is the day you expect to begin ground disturbing activities, including grubbing, stockpiling, excavating,
demolition, and grading activities.
Final Stabilization Date - in terms of permit coverage, this is when the site is finally stabilized. This means that all ground surface
disturbing activities at the site have been completed, and all disturbed areas have been either built on, paved, or a uniform vegetative
cover has been established with an individual plant density of at least 70 percent of pre-disturbance levels. Permit coverage must be
maintained until the site is finally stabilized. Even if you are only doing one part of the project, the estimated final stabilization
date must be for the overall project. If permit coverage is still required once your part is completed, the permit certification may be
transferred or reassigned to a new responsible entity(s).
H. RECEIVING WATERS (If discharge is to a ditch or storm sewer, include the name of the ultimate receiving waters)
Immediate Receiving Water(s):
Ultimate Receiving Water(s):
Identify the receiving water of the stormwater from your site. Receiving waters are any waters of the State of Colorado. This includes
all water courses, even if they are usually dry. If stormwater from the construction site enters a ditch or storm sewer system, identify
that system and indicate the ultimate receiving water for the ditch or storm sewer. Note: a stormwater discharge permit does not
allow a discharge into a ditch or storm sewer system without the approval of the owner/operator of that system.
page 4 of 5 revised April 2011
I. REQUIRED SIGNATURES (Both parts i. and ii. must be signed)
Signature of Applicant: The applicant must be either the owner and/or operator of the construction site. Refer to Part B of the instructions for additional information.
The application must be signed by the applicant to be considered complete. In all cases, it shall be signed as follows: (Regulation 61.4 (1ei)
a) In the case of corporations, by the responsible corporate officer is responsible for the overall operation of the facility from which the discharge
described in the form originates
b) In the case of a partnership, by a general partner.
c) In the case of a sole proprietorship, by the proprietor.
d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, (a principal executive officer
has responsibility for the overall operation of the facility from which the discharge originates).
STOP!: A Stormwater Management Plan must be completed prior to signing the following certifications!
i. STORMWATER MANAGEMENT PLAN CERTIFICATION
“I certify under penalty of law that a complete Stormwater Management Plan, has been prepared for my activity. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of
my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP,
including the possibility of fine and imprisonment for knowing violations.”
XX
Signature of Legally Responsible Person or Authorized Agent (submission must include original signature) Date Signed
Name (printed) Title
ii. SIGNATURE OF PERMIT LEGAL CONTACT
"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my
knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the
possibility of fine and imprisonment for knowing violations."
“I understand that submittal of this application is for coverage under the State of Colorado General Permit for Stormwater Discharges Associated with
Construction Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or the
certification is transferred, inactivated, or expired.”
XX
Signature of Legally Responsible Person (submission must include original signature) Date Signed
Name (printed Title
DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN
DO NOT INCLUDE PAYMENT – AN INVOICE WILL BE SENT AFTER THE CERTIFICATION IS ISSUED.
page 5 of 5 revised April 2011
APPENDIX C
Urban Drainage and Flood Control District BMPs
Surface Roughening (SR) EC-1
November 2010 Urban Drainage and Flood Control District SR-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SR-1. Surface roughening via imprinting for temporary
stabilization.
Description
Surface roughening is an erosion control
practice that involves tracking,
scarifying, imprinting, or tilling a
disturbed area to provide temporary
stabilization of disturbed areas. Surface
roughening creates variations in the soil
surface that help to minimize wind and
water erosion. Depending on the
technique used, surface roughening may
also help establish conditions favorable
to establishment of vegetation.
Appropriate Uses
Surface roughening can be used to
provide temporary stabilization of
disturbed areas, such as when
revegetation cannot be immediately established due to seasonal planting limitations. Surface roughening
is not a stand-alone BMP, and should be used in conjunction with other erosion and sediment controls.
Surface roughening is often implemented in conjunction with grading and is typically performed using
heavy construction equipment to track the surface. Be aware that tracking with heavy equipment will also
compact soils, which is not desirable in areas that will be revegetated. Scarifying, tilling, or ripping are
better surface roughening techniques in locations where revegetation is planned. Roughening is not
effective in very sandy soils and cannot be effectively performed in rocky soil.
Design and Installation
Typical design details for surfacing roughening on steep and mild slopes are provided in Details SR-1 and
SR-2, respectively.
Surface roughening should be performed either after final grading or to temporarily stabilize an area
during active construction that may be inactive for a short time period. Surface roughening should create
depressions 2 to 6 inches deep and approximately 6 inches apart. The surface of exposed soil can be
roughened by a number of techniques and equipment. Horizontal grooves (running parallel to the
contours of the land) can be made using tracks from equipment treads, stair-step grading, ripping, or
tilling.
Fill slopes can be constructed with a roughened surface. Cut slopes that have been smooth graded can be
roughened as a subsequent operation. Roughening should follow along the contours of the slope. The
tracks left by truck mounted equipment working perpendicular
to the contour can leave acceptable horizontal depressions;
however, the equipment will also compact the soil.
Surface Roughening
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management No
EC-1 Surface Roughening (SR)
SR-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Maintenance and Removal
Care should be taken not to drive vehicles or equipment over areas that have been surface roughened.
Tire tracks will smooth the roughened surface and may cause runoff to collect into rills and gullies.
Because surface roughening is only a temporary control, additional treatments may be necessary to
maintain the soil surface in a roughened condition.
Areas should be inspected for signs of erosion. Surface roughening is a temporary measure, and will not
provide long-term erosion control.
Surface Roughening (SR) EC-1
November 2010 Urban Drainage and Flood Control District SR-3
Urban Storm Drainage Criteria Manual Volume 3
EC-1 Surface Roughening (SR)
SR-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Temporary and Permanent Seeding (TS/PS) EC-2
June 2012 Urban Drainage and Flood Control District TS/PS-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph TS/PS -1. Equipment used to drill seed. Photo courtesy of
Douglas County.
Description
Temporary seeding can be used to
stabilize disturbed areas that will be
inactive for an extended period.
Permanent seeding should be used to
stabilize areas at final grade that will not
be otherwise stabilized. Effective seeding
includes preparation of a seedbed,
selection of an appropriate seed mixture,
proper planting techniques, and protection
of the seeded area with mulch, geotextiles,
or other appropriate measures.
Appropriate Uses
When the soil surface is disturbed and
will remain inactive for an extended
period (typically 30 days or longer),
proactive stabilization measures should be implemented. If the inactive period is short-lived (on the order
of two weeks), techniques such as surface roughening may be appropriate. For longer periods of
inactivity, temporary seeding and mulching can provide effective erosion control. Permanent seeding
should be used on finished areas that have not been otherwise stabilized.
Typically, local governments have their own seed mixes and timelines for seeding. Check jurisdictional
requirements for seeding and temporary stabilization.
Design and Installation
Effective seeding requires proper seedbed preparation, selection of an appropriate seed mixture, use of
appropriate seeding equipment to ensure proper coverage and density, and protection with mulch or fabric
until plants are established.
The USDCM Volume 2 Revegetation Chapter contains detailed seed mix, soil preparations, and seeding
and mulching recommendations that may be referenced to supplement this Fact Sheet.
Drill seeding is the preferred seeding method. Hydroseeding is not recommended except in areas where
steep slopes prevent use of drill seeding equipment, and even in these instances it is preferable to hand
seed and mulch. Some jurisdictions do not allow hydroseeding or hydromulching.
Seedbed Preparation
Prior to seeding, ensure that areas to be revegetated have
soil conditions capable of supporting vegetation. Overlot
grading can result in loss of topsoil, resulting in poor quality
subsoils at the ground surface that have low nutrient value,
little organic matter content, few soil microorganisms,
rooting restrictions, and conditions less conducive to
infiltration of precipitation. As a result, it is typically
necessary to provide stockpiled topsoil, compost, or other
Temporary and Permanent Seeding
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management No
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-2 Urban Drainage and Flood Control District June 2012
Urban Storm Drainage Criteria Manual Volume 3
soil amendments and rototill them into the soil to a depth of 6 inches or more.
Topsoil should be salvaged during grading operations for use and spread on areas to be revegetated later.
Topsoil should be viewed as an important resource to be utilized for vegetation establishment, due to its
water-holding capacity, structure, texture, organic matter content, biological activity, and nutrient content.
The rooting depth of most native grasses in the semi-arid Denver metropolitan area is 6 to 18 inches. At a
minimum, the upper 6 inches of topsoil should be stripped, stockpiled, and ultimately respread across
areas that will be revegetated.
Where topsoil is not available, subsoils should be amended to provide an appropriate plant-growth
medium. Organic matter, such as well digested compost, can be added to improve soil characteristics
conducive to plant growth. Other treatments can be used to adjust soil pH conditions when needed. Soil
testing, which is typically inexpensive, should be completed to determine and optimize the types and
amounts of amendments that are required.
If the disturbed ground surface is compacted, rip or rototill the surface prior to placing topsoil. If adding
compost to the existing soil surface, rototilling is necessary. Surface roughening will assist in placement
of a stable topsoil layer on steeper slopes, and allow infiltration and root penetration to greater depth.
Prior to seeding, the soil surface should be rough and the seedbed should be firm, but neither too loose
nor compacted. The upper layer of soil should be in a condition suitable for seeding at the proper depth
and conducive to plant growth. Seed-to-soil contact is the key to good germination.
Seed Mix for Temporary Vegetation
To provide temporary vegetative cover on disturbed areas which will not be paved, built upon, or fully
landscaped or worked for an extended period (typically 30 days or more), plant an annual grass
appropriate for the time of planting and mulch the planted areas. Annual grasses suitable for the Denver
metropolitan area are listed in Table TS/PS-1. These are to be considered only as general
recommendations when specific design guidance for a particular site is not available. Local governments
typically specify seed mixes appropriate for their jurisdiction.
Seed Mix for Permanent Revegetation
To provide vegetative cover on disturbed areas that have reached final grade, a perennial grass mix should
be established. Permanent seeding should be performed promptly (typically within 14 days) after
reaching final grade. Each site will have different characteristics and a landscape professional or the local
jurisdiction should be contacted to determine the most suitable seed mix for a specific site. In lieu of a
specific recommendation, one of the perennial grass mixes appropriate for site conditions and growth
season listed in Table TS/PS-2 can be used. The pure live seed (PLS) rates of application recommended
in these tables are considered to be absolute minimum rates for seed applied using proper drill-seeding
equipment.
If desired for wildlife habitat or landscape diversity, shrubs such as rubber rabbitbrush (Chrysothamnus
nauseosus), fourwing saltbush (Atriplex canescens) and skunkbrush sumac (Rhus trilobata) could be
added to the upland seedmixes at 0.25, 0.5 and 1 pound PLS/acre, respectively. In riparian zones,
planting root stock of such species as American plum (Prunus americana), woods rose (Rosa woodsii),
plains cottonwood (Populus sargentii), and willow (Populus spp.) may be considered. On non-topsoiled
upland sites, a legume such as Ladak alfalfa at 1 pound PLS/acre can be included as a source of nitrogen
for perennial grasses.
Temporary and Permanent Seeding (TS/PS) EC-2
June 2012 Urban Drainage and Flood Control District TS/PS-3
Urban Storm Drainage Criteria Manual Volume 3
Seeding dates for the highest success probability of perennial species along the Front Range are generally
in the spring from April through early May and in the fall after the first of September until the ground
freezes. If the area is irrigated, seeding may occur in summer months, as well. See Table TS/PS-3 for
appropriate seeding dates.
Table TS/PS-1. Minimum Drill Seeding Rates for Various Temporary Annual Grasses
Speciesa
(Common name)
Growth
Seasonb
Pounds of
Pure Live Seed
(PLS)/acrec
Planting
Depth
(inches)
1. Oats Cool 35 - 50 1 - 2
2. Spring wheat Cool 25 - 35 1 - 2
3. Spring barley Cool 25 - 35 1 - 2
4. Annual ryegrass Cool 10 - 15 ½
5. Millet Warm 3 - 15 ½ - ¾
6. Sudangrass Warm 5–10 ½ - ¾
7. Sorghum Warm 5–10 ½ - ¾
8. Winter wheat Cool 20–35 1 - 2
9. Winter barley Cool 20–35 1 - 2
10. Winter rye Cool 20–35 1 - 2
11. Triticale Cool 25–40 1 - 2
a Successful seeding of annual grass resulting in adequate plant growth will
usually produce enough dead-plant residue to provide protection from
wind and water erosion for an additional year. This assumes that the cover
is not disturbed or mowed closer than 8 inches.
Hydraulic seeding may be substituted for drilling only where slopes are
steeper than 3:1 or where access limitations exist. When hydraulic
seeding is used, hydraulic mulching should be applied as a separate
operation, when practical, to prevent the seeds from being encapsulated in
the mulch.
b See Table TS/PS-3 for seeding dates. Irrigation, if consistently applied,
may extend the use of cool season species during the summer months.
c Seeding rates should be doubled if seed is broadcast, or increased by 50
percent if done using a Brillion Drill or by hydraulic seeding.
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-4 Urban Drainage and Flood Control District June 2012
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-2. Minimum Drill Seeding Rates for Perennial Grasses
Commona
Name
Botanical
Name
Growth
Seasonb
Growth
Form
Seeds/
Pound
Pounds of
PLS/acre
Alakali Soil Seed Mix
Alkali sacaton Sporobolus airoides Cool Bunch 1,750,000 0.25
Basin wildrye Elymus cinereus Cool Bunch 165,000 2.5
Sodar streambank wheatgrass Agropyron riparium 'Sodar'Cool Sod 170,000 2.5
Jose tall wheatgrass Agropyron elongatum 'Jose'Cool Bunch 79,000 7.0
Arriba western wheatgrass Agropyron smithii 'Arriba'Cool Sod 110,000 5.5
Total 17.75
Fertile Loamy Soil Seed Mix
Ephriam crested wheatgrass Agropyron cristatum
'Ephriam'Cool Sod 175,000 2.0
Dural hard fescue Festuca ovina 'duriuscula'Cool Bunch 565,000 1.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln'Cool Sod 130,000 3.0
Sodar streambank wheatgrass Agropyron riparium 'Sodar'Cool Sod 170,000 2.5
Arriba western wheatgrass Agropyron smithii 'Arriba'Cool Sod 110,000 7.0
Total 15.5
High Water Table Soil Seed Mix
Meadow foxtail Alopecurus pratensis Cool Sod 900,000 0.5
Redtop Agrostis alba Warm Open sod 5,000,000 0.25
Reed canarygrass Phalaris arundinacea Cool Sod 68,000 0.5
Lincoln smooth brome Bromus inermis leyss
'Lincoln'Cool Sod 130,000 3.0
Pathfinder switchgrass Panicum virgatum
'Pathfinder'Warm Sod 389,000 1.0
Alkar tall wheatgrass Agropyron elongatum
'Alkar'Cool Bunch 79,000 5.5
Total 10.75
Transition Turf Seed Mixc
Ruebens Canadian bluegrass Poa compressa 'Ruebens'Cool Sod 2,500,000 0.5
Dural hard fescue Festuca ovina 'duriuscula'Cool Bunch 565,000 1.0
Citation perennial ryegrass Lolium perenne 'Citation'Cool Sod 247,000 3.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln'Cool Sod 130,000 3.0
Total 7.5
Temporary and Permanent Seeding (TS/PS) EC-2
June 2012 Urban Drainage and Flood Control District TS/PS-5
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-2. Minimum Drill Seeding Rates for Perennial Grasses (cont.)
Common
Name
Botanical
Name
Growth
Seasonb
Growth
Form
Seeds/
Pound
Pounds of
PLS/acre
Sandy Soil Seed Mix
Blue grama Bouteloua gracilis Warm Sod-forming
bunchgrass 825,000 0.5
Camper little bluestem Schizachyrium scoparium
'Camper'Warm Bunch 240,000 1.0
Prairie sandreed Calamovilfa longifolia Warm Open sod 274,000 1.0
Sand dropseed Sporobolus cryptandrus Cool Bunch 5,298,000 0.25
Vaughn sideoats grama Bouteloua curtipendula
'Vaughn'Warm Sod 191,000 2.0
Arriba western wheatgrass Agropyron smithii 'Arriba'Cool Sod 110,000 5.5
Total 10.25
Heavy Clay, Rocky Foothill Seed Mix
Ephriam crested wheatgrassd Agropyron cristatum
'Ephriam'Cool Sod 175,000 1.5
Oahe Intermediate wheatgrass Agropyron intermedium
'Oahe'Cool Sod 115,000 5.5
Vaughn sideoats gramae Bouteloua curtipendula
'Vaughn'Warm Sod 191,000 2.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln'Cool Sod 130,000 3.0
Arriba western wheatgrass Agropyron smithii 'Arriba'Cool Sod 110,000 5.5
Total 17.5
a All of the above seeding mixes and rates are based on drill seeding followed by crimped straw mulch. These rates should be
doubled if seed is broadcast and should be increased by 50 percent if the seeding is done using a Brillion Drill or is applied
through hydraulic seeding. Hydraulic seeding may be substituted for drilling only where slopes are steeper than 3:1. If
hydraulic seeding is used, hydraulic mulching should be done as a separate operation.
b See Table TS/PS-3 for seeding dates.
c If site is to be irrigated, the transition turf seed rates should be doubled.
d Crested wheatgrass should not be used on slopes steeper than 6H to 1V.
e Can substitute 0.5 lbs PLS of blue grama for the 2.0 lbs PLS of Vaughn sideoats grama.
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-6 Urban Drainage and Flood Control District June 2012
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-3. Seeding Dates for Annual and Perennial Grasses
Annual Grasses
(Numbers in table reference
species in Table TS/PS-1)
Perennial Grasses
Seeding Dates Warm Cool Warm Cool
January 1–March 15 99
March 16–April 30 4 1,2,3 99
May 1–May 15 4 9
May 16–June 30 4,5,6,7
July 1–July 15 5,6,7
July 16–August 31
September 1–September 30 8,9,10,11
October 1–December 31 99
Mulch
Cover seeded areas with mulch or an appropriate rolled erosion control product to promote establishment
of vegetation. Anchor mulch by crimping, netting or use of a non-toxic tackifier. See the Mulching BMP
Fact Sheet for additional guidance.
Maintenance and Removal
Monitor and observe seeded areas to identify areas of poor growth or areas that fail to germinate. Reseed
and mulch these areas, as needed.
An area that has been permanently seeded should have a good stand of vegetation within one growing
season if irrigated and within three growing seasons without irrigation in Colorado. Reseed portions of
the site that fail to germinate or remain bare after the first growing season.
Seeded areas may require irrigation, particularly during extended dry periods. Targeted weed control may
also be necessary.
Protect seeded areas from construction equipment and vehicle access.
Soil Binders (SB) EC-3
November 2010 Urban Drainage and Flood Control District SB-1
Urban Storm Drainage Criteria Manual Volume 3
Description
Soil binders include a broad range of
treatments that can be applied to exposed
soils for temporary stabilization to reduce
wind and water erosion. Soil binders may
be applied alone or as tackifiers in
conjunction with mulching and seeding
applications.
Acknowledgement: This BMP Fact Sheet
has been adapted from the 2003
California Stormwater Quality
Association (CASQA) Stormwater BMP
Handbook: Construction
(www.cabmphandbooks.com).
Appropriate Uses
Soil binders can be used for short-term, temporary stabilization of soils on both mild and steep slopes.
Soil binders are often used in areas where work has temporarily stopped, but is expected to resume before
revegetation can become established. Binders are also useful on stockpiled soils or where temporary or
permanent seeding has occurred.
Prior to selecting a soil binder, check with the state and local jurisdiction to ensure that the chemicals
used in the soil binders are allowed. The water quality impacts of some types of soil binders are relatively
unknown and may not be allowed due to concerns about potential environmental impacts. Soil binders
must be environmentally benign (non-toxic to plant and animal life), easy to apply, easy to maintain,
economical, and should not stain paved or painted surfaces.
Soil binders should not be used in vehicle or pedestrian high traffic areas, due to loss in effectiveness
under these conditions.
Site soil type will dictate appropriate soil binders to be used. Be aware that soil binders may not function
effectively on silt or clay soils or highly compacted areas. Check manufacturer's recommendations for
appropriateness with regard to soil conditions. Some binders may not be suitable for areas with existing
vegetation.
Design and Installation
Properties of common soil binders used for erosion control
are provided in Table SB-1. Design and installation
guidance below are provided for general reference. Follow
the manufacturer's instructions for application rates and
procedures.
Soil Binders
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management Moderate
Photograph SB-1.Tackifier being applied to provide temporary soil
stabilization. Photo courtesy of Douglas County.
EC-3 Soil Binders (SB)
SB-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Table SB-1. Properties of Soil Binders for Erosion Control (Source: CASQA 2003)
Evaluation Criteria
Binder Type
Plant Material
Based
(short lived)
Plant Material
Based
(long lived)
Polymeric
Emulsion Blends
Cementitious-
Based Binders
Resistance to Leaching High High Low to Moderate Moderate
Resistance to Abrasion Moderate Low Moderate to High Moderate to High
Longevity Short to Medium Medium Medium to Long Medium
Minimum Curing Time
before Rain 9 to 18 hours 19 to 24 hours 0 to 24 hours 4 to 8 hours
Compatibility with
Existing Vegetation Good Poor Poor Poor
Mode of Degradation Biodegradable Biodegradable
Photodegradable/
Chemically
Degradable
Photodegradable/
Chemically
Degradable
Specialized Application
Equipment
Water Truck or
Hydraulic
Mulcher
Water Truck or
Hydraulic
Mulcher
Water Truck or
Hydraulic Mulcher
Water Truck or
Hydraulic Mulcher
Liquid/Powder Powder Liquid Liquid/Powder Powder
Surface Crusting
Yes, but
dissolves on
rewetting
Yes Yes, but dissolves on
rewetting Yes
Clean Up Water Water Water Water
Erosion Control
Application Rate Varies Varies Varies
4,000 to 12,000
lbs/acre Typ.
Soil Binders (SB) EC-3
November 2010 Urban Drainage and Flood Control District SB-3
Urban Storm Drainage Criteria Manual Volume 3
Factors to consider when selecting a soil binder generally include:
Suitability to situation: Consider where the soil binder will be applied, if it needs a high resistance
to leaching or abrasion, and whether it needs to be compatible with existing vegetation. Determine
the length of time soil stabilization will be needed, and if the soil binder will be placed in an area
where it will degrade rapidly. In general, slope steepness is not a discriminating factor.
Soil types and surface materials: Fines and moisture content are key properties of surface
materials. Consider a soil binder's ability to penetrate, likelihood of leaching, and ability to form a
surface crust on the surface materials.
Frequency of application: The frequency of application can be affected by subgrade conditions,
surface type, climate, and maintenance schedule. Frequent applications could lead to high costs.
Application frequency may be minimized if the soil binder has good penetration, low evaporation,
and good longevity. Consider also that frequent application will require frequent equipment clean up.
An overview of major categories of soil binders, corresponding to the types included in Table SB-1
follows.
Plant-Material Based (Short Lived) Binders
Guar: A non-toxic, biodegradable, natural galactomannan-based hydrocolloid treated with dispersant
agents for easy field mixing. It should be mixed with water at the rate of 11 to 15 lbs per 1,000
gallons. Recommended minimum application rates are provided in Table SB-2.
Table SB-2. Application Rates for Guar Soil Stabilizer
Slope (H:V)
Flat 4:1 3:1 2:1 1:1
Application Rate (lb/acre)40 45 50 60 70
Psyllium: Composed of the finely ground muciloid coating of plantago seeds that is applied as a wet
slurry to the surface of the soil. It dries to form a firm but rewettable membrane that binds soil
particles together but permits germination and growth of seed. Psyllium requires 12 to 18 hours
drying time. Application rates should be from 80 to 200 lbs/acre, with enough water in solution to
allow for a uniform slurry flow.
Starch: Non-ionic, cold-water soluble (pre-gelatinized) granular cornstarch. The material is mixed
with water and applied at the rate of 150 lb/acre. Approximate drying time is 9 to 12 hours.
Plant-Material Based (Long Lived) Binders
Pitch and Rosin Emulsion: Generally, a non-ionic pitch and rosin emulsion has a minimum solids
content of 48 percent. The rosin should be a minimum of 26 percent of the total solids content. The
soil stabilizer should be a non-corrosive, water dilutable emulsion that upon application cures to a
water insoluble binding and cementing agent. For soil erosion control applications, the emulsion is
diluted and should be applied as follows:
o For clayey soil: 5 parts water to 1 part emulsion
EC-3 Soil Binders (SB)
SB-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
o For sandy soil: 10 parts water to 1 part emulsion
Application can be by water truck or hydraulic seeder with the emulsion and product mixture applied
at the rate specified by the manufacturer.
Polymeric Emulsion Blend Binders
Acrylic Copolymers and Polymers: Polymeric soil stabilizers should consist of a liquid or solid
polymer or copolymer with an acrylic base that contains a minimum of 55 percent solids. The
polymeric compound should be handled and mixed in a manner that will not cause foaming or should
contain an anti-foaming agent. The polymeric emulsion should not exceed its shelf life or expiration
date; manufacturers should provide the expiration date. Polymeric soil stabilizer should be readily
miscible in water, non-injurious to seed or animal life, non-flammable, should provide surface soil
stabilization for various soil types without inhibiting water infiltration, and should not re-emulsify
when cured. The applied compound should air cure within a maximum of 36 to 48 hours. Liquid
copolymer should be diluted at a rate of 10 parts water to 1 part polymer and the mixture applied to
soil at a rate of 1,175 gallons/acre.
Liquid Polymers of Methacrylates and Acrylates: This material consists of a tackifier/sealer that is
a liquid polymer of methacrylates and acrylates. It is an aqueous 100 percent acrylic emulsion blend
of 40 percent solids by volume that is free from styrene, acetate, vinyl, ethoxylated surfactants or
silicates. For soil stabilization applications, it is diluted with water in accordance with manufacturer's
recommendations, and applied with a hydraulic seeder at the rate of 20 gallons/acre. Drying time is
12 to 18 hours after application.
Copolymers of Sodium Acrylates and Acrylamides: These materials are non-toxic, dry powders
that are copolymers of sodium acrylate and acrylamide. They are mixed with water and applied to the
soil surface for erosion control at rates that are determined by slope gradient, as summarized in Table
SB-3.
Table SB-3. Application Rates for Copolymers of Sodium Acrylates and Acrylamides
Slope (H:V)
Flat to 5:1 5:1 to 3:1 2:2 to 1:1
Application Rate (lb/acre)3.0-5.0 5.0-10.0 10.0-20.0
Polyacrylamide and Copolymer of Acrylamide: Linear copolymer polyacrylamide is packaged as
a dry flowable solid. When used as a stand-alone stabilizer, it is diluted at a rate of 11 lb/1,000 gal. of
water and applied at the rate of 5.0 lb/acre.
Hydrocolloid Polymers: Hydrocolloid Polymers are various combinations of dry flowable
polyacrylamides, copolymers, and hydrocolloid polymers that are mixed with water and applied to the
soil surface at rates of 55 to 60 lb/acre. Drying times are 0 to 4 hours.
Cementitious-Based Binders
Gypsum: This formulated gypsum based product readily mixes with water and mulch to form a thin
protective crust on the soil surface. It is composed of high purity gypsum that is ground, calcined and
processed into calcium sulfate hemihydrate with a minimum purity of 86 percent. It is mixed in a
hydraulic seeder and applied at rates 4,000 to 12,000 lb/acre. Drying time is 4 to 8 hours.
Soil Binders (SB) EC-3
November 2010 Urban Drainage and Flood Control District SB-5
Urban Storm Drainage Criteria Manual Volume 3
Installation
After selecting an appropriate soil binder, the untreated soil surface must be prepared before applying the
soil binder. The untreated soil surface must contain sufficient moisture to assist the agent in achieving
uniform distribution. In general, the following steps should be followed:
Follow manufacturer's written recommendations for application rates, pre-wetting of application area,
and cleaning of equipment after use.
Prior to application, roughen embankment and fill areas.
Consider the drying time for the selected soil binder and apply with sufficient time before anticipated
rainfall. Soil binders should not be applied during or immediately before rainfall.
Avoid over spray onto roads, sidewalks, drainage channels, sound walls, existing vegetation, etc.
Soil binders should not be applied to frozen soil, areas with standing water, under freezing or rainy
conditions, or when the temperature is below 40°F during the curing period.
More than one treatment is often necessary, although the second treatment may be diluted or have a
lower application rate.
Generally, soil binders require a minimum curing time of 24 hours before they are fully effective.
Refer to manufacturer's instructions for specific cure time.
For liquid agents:
o Crown or slope ground to avoid ponding.
o Uniformly pre-wet ground at 0.03 to 0.3 gal/yd2 or according to manufacturer's recommendations.
o Apply solution under pressure. Overlap solution 6 to 12 in.
o Allow treated area to cure for the time recommended by the manufacturer, typically at least 24
hours.
o Apply second treatment before first treatment becomes ineffective, using 50 percent application
rate.
o In low humidity, reactivate chemicals by re-wetting with water at 0.1 to 0.2 gal/yd2.
Maintenance and Removal
Soil binders tend to break down due to natural weathering. Weathering rates depend on a variety of site-
specific and product characteristics. Consult the manufacturer for recommended reapplication rates and
reapply the selected soil binder as needed to maintain effectiveness.
Soil binders can fail after heavy rainfall events and may require reapplication. In particular, soil binders
will generally experience spot failures during heavy rainfall events. If runoff penetrates the soil at the top
of a slope treated with a soil binder, it is likely that the runoff will undercut the stabilized soil layer and
discharge at a point further down slope.
EC-3 Soil Binders (SB)
SB-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Areas where erosion is evident should be repaired and soil binder or other stabilization reapplied, as
needed. Care should be exercised to minimize the damage to protected areas while making repairs.
Most binders biodegrade after exposure to sun, oxidation, heat and biological organisms; therefore,
removal of the soil binder is not typically required.
Wind Erosion/Dust Control (DC) EC-14
November 2010 Urban Drainage and Flood Control District DC-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph DC-1. Water truck used for dust suppression. Photo
courtesy of Douglas County.
Description
Wind erosion and dust control BMPs
help to keep soil particles from entering
the air as a result of land disturbing
construction activities. These BMPs
include a variety of practices generally
focused on either graded disturbed areas
or construction roadways. For graded
areas, practices such as seeding and
mulching, use of soil binders, site
watering, or other practices that provide
prompt surface cover should be used.
For construction roadways, road
watering and stabilized surfaces should
be considered.
Appropriate Uses
Dust control measures should be used on any site where dust poses a problem to air quality. Dust control
is important to control for the health of construction workers and surrounding waterbodies.
Design and Installation
The following construction BMPs can be used for dust control:
An irrigation/sprinkler system can be used to wet the top layer of disturbed soil to help keep dry soil
particles from becoming airborne.
Seeding and mulching can be used to stabilize disturbed surfaces and reduce dust emissions.
Protecting existing vegetation can help to slow wind velocities across the ground surface, thereby
limiting the likelihood of soil particles to become airborne.
Spray-on soil binders form a bond between soil particles keeping them grounded. Chemical
treatments may require additional permitting requirements. Potential impacts to surrounding
waterways and habitat must be considered prior to use.
Placing rock on construction roadways and entrances will help keep dust to a minimum across the
construction site.
Wind fences can be installed on site to reduce wind
speeds. Install fences perpendicular to the prevailing
wind direction for maximum effectiveness.
Maintenance and Removal
When using an irrigation/sprinkler control system to aid in
dust control, be careful not to overwater. Overwatering will
cause construction vehicles to track mud off-site.
Wind Erosion Control/
Dust Control
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management Moderate
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SP-1. A topsoil stockpile that has been partially
revegetated and is protected by silt fence perimeter control.
Description
Stockpile management includes
measures to minimize erosion and
sediment transport from soil stockpiles.
Appropriate Uses
Stockpile management should be used
when soils or other erodible materials
are stored at the construction site.
Special attention should be given to
stockpiles in close proximity to natural
or manmade storm systems.
Design and Installation
Locate stockpiles away from all drainage system components including storm sewer inlets. Where
practical, choose stockpile locations that that will remain undisturbed for the longest period of time as the
phases of construction progress. Place sediment control BMPs around the perimeter of the stockpile, such
as sediment control logs, rock socks, silt fence, straw bales and sand bags. See Detail SP-1 for guidance
on proper establishment of perimeter controls around a stockpile. For stockpiles in active use, provide a
stabilized designated access point on the upgradient side of the stockpile.
Stabilize the stockpile surface with surface roughening, temporary seeding and mulching, erosion control
blankets, or soil binders. Soils stockpiled for an extended period (typically for more than 60 days) should
be seeded and mulched with a temporary grass cover once the stockpile is placed (typically within 14
days). Use of mulch only or a soil binder is acceptable if the stockpile will be in place for a more limited
time period (typically 30-60 days). Timeframes for stabilization of stockpiles noted in this fact sheet are
"typical" guidelines. Check permit requirements for specific federal, state, and/or local requirements that
may be more prescriptive.
Stockpiles should not be placed in streets or paved areas unless no other practical alternative exists. See
the Stabilized Staging Area Fact Sheet for guidance when staging in roadways is unavoidable due to
space or right-of-way constraints. For paved areas, rock socks must be used for perimeter control and all
inlets with the potential to receive sediment from the stockpile (even from vehicle tracking) must be
protected.
Maintenance and Removal
Inspect perimeter controls and inlet protection in accordance with their respective BMP Fact Sheets.
Where seeding, mulch and/or soil binders are used, reseeding or reapplication of soil binder may be
necessary.
When temporary removal of a perimeter BMP is necessary
to access a stockpile, ensure BMPs are reinstalled in
accordance with their respective design detail section.
Stockpile Management
Functions
Erosion Control Yes
Sediment Control Yes
Site/Material Management Yes
MM-2 Stockpile Management (SM)
SP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
When the stockpile is no longer needed, properly dispose of excess materials and revegetate or otherwise
stabilize the ground surface where the stockpile was located.
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-3
Urban Storm Drainage Criteria Manual Volume 3
MM-2 Stockpile Management (SM)
SP-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-5
Urban Storm Drainage Criteria Manual Volume 3
MM-2 Stockpile Management (SM)
SP-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-1
Urban Storm Drainage Criteria Manual Volume 3
Photographs GH-1 and GH-2. Proper materials
storage and secondary containment for fuel tanks
are important good housekeeping practices. Photos
courtesy of CDOT and City of Aurora.
Description
Implement construction site good housekeeping practices to
prevent pollution associated with solid, liquid and hazardous
construction-related materials and wastes. Stormwater
Management Plans (SWMPs) should clearly specify BMPs
including these good housekeeping practices:
Provide for waste management.
Establish proper building material staging areas.
Designate paint and concrete washout areas.
Establish proper equipment/vehicle fueling and
maintenance practices.
Control equipment/vehicle washing and allowable non-
stormwater discharges.
Develop a spill prevention and response plan.
Acknowledgement: This Fact Sheet is based directly on
EPA guidance provided in Developing Your Stormwater
Pollution Prevent Plan (EPA 2007).
Appropriate Uses
Good housekeeping practices are necessary at all construction sites.
Design and Installation
The following principles and actions should be addressed in SWMPs:
Provide for Waste Management.Implement management procedures and practices to prevent or
reduce the exposure and transport of pollutants in stormwater from solid, liquid and sanitary wastes
that will be generated at the site. Practices such as trash disposal, recycling, proper material handling,
and cleanup measures can reduce the potential for stormwater runoff to pick up construction site
wastes and discharge them to surface waters. Implement a comprehensive set of waste-management
practices for hazardous or toxic materials, such as paints, solvents, petroleum products, pesticides,
wood preservatives, acids, roofing tar, and other materials. Practices should include storage,
handling, inventory, and cleanup procedures, in case of spills. Specific practices that should be
considered include:
Solid or Construction Waste
o Designate trash and bulk waste-collection areas on-
site.
Good Housekeeping
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
MM-3 Good Housekeeping Practices (GH)
GH-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph GH-3. Locate portable toilet facilities on level
surfaces away from waterways and storm drains. Photo
courtesy of WWE.
o Recycle materials whenever possible (e.g., paper, wood, concrete, oil).
o Segregate and provide proper disposal options for hazardous material wastes.
o Clean up litter and debris from the construction site daily.
o Locate waste-collection areas away from streets, gutters, watercourses, and storm drains. Waste-
collection areas (dumpsters, and such) are often best located near construction site entrances to
minimize traffic on disturbed soils. Consider secondary containment around waste collection
areas to minimize the likelihood of contaminated discharges.
o Empty waste containers before they are full and overflowing.
Sanitary and Septic Waste
o Provide convenient, well-maintained, and properly located toilet facilities on-site.
o Locate toilet facilities away from storm drain inlets and waterways to prevent accidental spills
and contamination of stormwater.
o Maintain clean restroom facilities and empty portable toilets regularly.
o Where possible, provide secondary containment pans under portable toilets.
o Provide tie-downs or stake-downs for portable toilets.
o Educate employees, subcontractors, and suppliers on locations of facilities.
o Treat or dispose of sanitary and septic waste in accordance with state or local regulations. Do not
discharge or bury wastewater at the construction site.
o Inspect facilities for leaks. If found, repair or replace immediately.
o Special care is necessary during maintenance (pump out) to ensure that waste and/or biocide are
not spilled on the ground.
Hazardous Materials and Wastes
o Develop and implement employee and
subcontractor education, as needed, on
hazardous and toxic waste handling,
storage, disposal, and cleanup.
o Designate hazardous waste-collection
areas on-site.
o Place all hazardous and toxic material
wastes in secondary containment.
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-3
Urban Storm Drainage Criteria Manual Volume 3
o Hazardous waste containers should be inspected to ensure that all containers are labeled properly
and that no leaks are present.
Establish Proper Building Material Handling and Staging Areas. The SWMP should include
comprehensive handling and management procedures for building materials, especially those that are
hazardous or toxic. Paints, solvents, pesticides, fuels and oils, other hazardous materials or building
materials that have the potential to contaminate stormwater should be stored indoors or under cover
whenever possible or in areas with secondary containment. Secondary containment measures prevent
a spill from spreading across the site and may include dikes, berms, curbing, or other containment
methods. Secondary containment techniques should also ensure the protection of groundwater.
Designate staging areas for activities such as fueling vehicles, mixing paints, plaster, mortar, and
other potential pollutants. Designated staging areas enable easier monitoring of the use of materials
and clean up of spills. Training employees and subcontractors is essential to the success of this
pollution prevention principle. Consider the following specific materials handling and staging
practices:
o Train employees and subcontractors in proper handling and storage practices.
o Clearly designate site areas for staging and storage with signs and on construction drawings.
Staging areas should be located in areas central to the construction site. Segment the staging area
into sub-areas designated for vehicles, equipment, or stockpiles. Construction entrances and exits
should be clearly marked so that delivery vehicles enter/exit through stabilized areas with vehicle
tracking controls (See Vehicle Tracking Control Fact Sheet).
o Provide storage in accordance with Spill Protection, Control and Countermeasures (SPCC)
requirements and plans and provide cover and impermeable perimeter control, as necessary, for
hazardous materials and contaminated soils that must be stored on site.
o Ensure that storage containers are regularly inspected for leaks, corrosion, support or foundation
failure, or other signs of deterioration and tested for soundness.
o Reuse and recycle construction materials when possible.
Designate Concrete Washout Areas. Concrete contractors should be encouraged to use the washout
facilities at their own plants or dispatch facilities when feasible; however, concrete washout
commonly occurs on construction sites. If it is necessary to provide for concrete washout areas on-
site, designate specific washout areas and design facilities to handle anticipated washout water.
Washout areas should also be provided for paint and stucco operations. Because washout areas can
be a source of pollutants from leaks or spills, care must be taken with regard to their placement and
proper use. See the Concrete Washout Area Fact Sheet for detailed guidance.
Both self-constructed and prefabricated washout containers can fill up quickly when concrete, paint,
and stucco work are occurring on large portions of the site. Be sure to check for evidence that
contractors are using the washout areas and not dumping materials onto the ground or into drainage
facilities. If the washout areas are not being used regularly, consider posting additional signage,
relocating the facilities to more convenient locations, or providing training to workers and
contractors.
When concrete, paint, or stucco is part of the construction process, consider these practices which will
help prevent contamination of stormwater. Include the locations of these areas and the maintenance
and inspection procedures in the SWMP.
MM-3 Good Housekeeping Practices (GH)
GH-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
o Do not washout concrete trucks or equipment into storm drains, streets, gutters, uncontained
areas, or streams. Only use designated washout areas.
o Establish washout areas and advertise their locations with signs. Ensure that signage remains in
good repair.
o Provide adequate containment for the amount of wash water that will be used.
o Inspect washout structures daily to detect leaks or tears and to identify when materials need to be
removed.
o Dispose of materials properly. The preferred method is to allow the water to evaporate and to
recycle the hardened concrete. Full service companies may provide dewatering services and
should dispose of wastewater properly. Concrete wash water can be highly polluted. It should
not be discharged to any surface water, storm sewer system, or allowed to infiltrate into the
ground in the vicinity of waterbodies. Washwater should not be discharged to a sanitary sewer
system without first receiving written permission from the system operator.
Establish Proper Equipment/Vehicle Fueling and Maintenance Practices. Create a clearly
designated on-site fueling and maintenance area that is clean and dry. The on-site fueling area should
have a spill kit, and staff should know how to use it. If possible, conduct vehicle fueling and
maintenance activities in a covered area. Consider the following practices to help prevent the
discharge of pollutants to stormwater from equipment/vehicle fueling and maintenance. Include the
locations of designated fueling and maintenance areas and inspection and maintenance procedures in
the SWMP.
o Train employees and subcontractors in proper fueling procedures (stay with vehicles during
fueling, proper use of pumps, emergency shutoff valves, etc.).
o Inspect on-site vehicles and equipment regularly for leaks, equipment damage, and other service
problems.
o Clearly designate vehicle/equipment service areas away from drainage facilities and watercourses
to prevent stormwater run-on and runoff.
o Use drip pans, drip cloths, or absorbent pads when replacing spent fluids.
o Collect all spent fluids, store in appropriate labeled containers in the proper storage areas, and
recycle fluids whenever possible.
Control Equipment/Vehicle Washing and Allowable Non-Stormwater Discharges.Implement
practices to prevent contamination of surface and groundwater from equipment and vehicle wash
water. Representative practices include:
o Educate employees and subcontractors on proper washing procedures.
o Use off-site washing facilities, when available.
o Clearly mark the washing areas and inform workers that all washing must occur in this area.
o Contain wash water and treat it using BMPs. Infiltrate washwater when possible, but maintain
separation from drainage paths and waterbodies.
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-5
Urban Storm Drainage Criteria Manual Volume 3
o Use high-pressure water spray at vehicle washing facilities without detergents. Water alone can
remove most dirt adequately.
o Do not conduct other activities, such as vehicle repairs, in the wash area.
o Include the location of the washing facilities and the inspection and maintenance procedures in
the SWMP.
Develop a Spill Prevention and Response Plan.Spill prevention and response procedures must be
identified in the SWMP. Representative procedures include identifying ways to reduce the chance of
spills, stop the source of spills, contain and clean up spills, dispose of materials contaminated by
spills, and train personnel responsible for spill prevention and response. The plan should also specify
material handling procedures and storage requirements and ensure that clear and concise spill cleanup
procedures are provided and posted for areas in which spills may potentially occur. When developing
a spill prevention plan, include the following:
o Note the locations of chemical storage areas, storm drains, tributary drainage areas, surface
waterbodies on or near the site, and measures to stop spills from leaving the site.
o Provide proper handling and safety procedures for each type of waste. Keep Material Safety Data
Sheets (MSDSs) for chemical used on site with the SWMP.
o Establish an education program for employees and subcontractors on the potential hazards to
humans and the environment from spills and leaks.
o Specify how to notify appropriate authorities, such as police and fire departments, hospitals, or
municipal sewage treatment facilities to request assistance. Emergency procedures and contact
numbers should be provided in the SWMP and posted at storage locations.
o Describe the procedures, equipment and materials for immediate cleanup of spills and proper
disposal.
o Identify personnel responsible for implementing the plan in the event of a spill. Update the spill
prevention plan and clean up materials as changes occur to the types of chemicals stored and used
at the facility.
MM-3 Good Housekeeping Practices (GH)
GH-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Spill Prevention, Control, and Countermeasure (SPCC) Plan
Construction sites may be subject to 40 CFR Part 112 regulations that require the preparation and
implementation of a SPCC Plan to prevent oil spills from aboveground and underground storage tanks.
The facility is subject to this rule if it is a non-transportation-related facility that:
Has a total storage capacity greater than 1,320 gallons or a completely buried storage capacity
greater than 42,000 gallons.
Could reasonably be expected to discharge oil in quantities that may be harmful to navigable waters
of the United States and adjoining shorelines.
Furthermore, if the facility is subject to 40 CFR Part 112, the SWMP should reference the SPCC Plan.
To find out more about SPCC Plans, see EPA's website on SPPC at www.epa.gov/oilspill/spcc.htm.
Reporting Oil Spills
In the event of an oil spill, contact the National Response Center toll free at 1-800-424- 8802 for
assistance, or for more details, visit their website: www.nrc.uscg.mil.
Maintenance and Removal
Effective implementation of good housekeeping practices is dependent on clear designation of personnel
responsible for supervising and implementing good housekeeping programs, such as site cleanup and
disposal of trash and debris, hazardous material management and disposal, vehicle and equipment
maintenance, and other practices. Emergency response "drills" may aid in emergency preparedness.
Checklists may be helpful in good housekeeping efforts.
Staging and storage areas require permanent stabilization when the areas are no longer being used for
construction-related activities.
Construction-related materials, debris and waste must be removed from the construction site once
construction is complete.
Design Details
See the following Fact Sheets for related Design Details:
MM-1 Concrete Washout Area
MM-2 Stockpile Management
SM-4 Vehicle Tracking Control
Design details are not necessary for other good housekeeping practices; however, be sure to designate
where specific practices will occur on the appropriate construction drawings.
Silt Fence (SF) SC-1
November 2010 Urban Drainage and Flood Control District SF-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SF-1.Silt fence creates a sediment barrier, forcing
sheet flow runoff to evaporate or infiltrate.
Description
A silt fence is a woven geotextile fabric
attached to wooden posts and trenched
into the ground. It is designed as a
sediment barrier to intercept sheet flow
runoff from disturbed areas.
Appropriate Uses
A silt fence can be used where runoff is
conveyed from a disturbed area as sheet
flow. Silt fence is not designed to
receive concentrated flow or to be used
as a filter fabric. Typical uses include:
Down slope of a disturbed area to
accept sheet flow.
Along the perimeter of a receiving
water such as a stream, pond or
wetland.
At the perimeter of a construction site.
Design and Installation
Silt fence should be installed along the contour of slopes so that it intercepts sheet flow. The maximum
recommended tributary drainage area per 100 lineal feet of silt fence, installed along the contour, is
approximately 0.25 acres with a disturbed slope length of up to 150 feet and a tributary slope gradient no
steeper than 3:1. Longer and steeper slopes require additional measures. This recommendation only
applies to silt fence installed along the contour. Silt fence installed for other uses, such as perimeter
control, should be installed in a way that will not produce concentrated flows. For example, a "J-hook"
installation may be appropriate to force runoff to pond and evaporate or infiltrate in multiple areas rather
than concentrate and cause erosive conditions parallel to the silt fence.
See Detail SF-1 for proper silt fence installation, which involves proper trenching, staking, securing the
fabric to the stakes, and backfilling the silt fence. Properly installed silt fence should not be easily pulled
out by hand and there should be no gaps between the ground and the fabric.
Silt fence must meet the minimum allowable strength requirements, depth of installation requirement, and
other specifications in the design details. Improper installation
of silt fence is a common reason for silt fence failure; however,
when properly installed and used for the appropriate purposes, it
can be highly effective.
Silt Fence
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management No
SC-1 Silt Fence (SF)
SF-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph SF-2.When silt fence is not installed along
the contour, a "J-hook" installation may be appropriate
to ensure that the BMP does not create concentrated
flow parallel to the silt fence. Photo courtesy of Tom
Gore.
Maintenance and Removal
Inspection of silt fence includes observing the
material for tears or holes and checking for slumping
fence and undercut areas bypassing flows. Repair of
silt fence typically involves replacing the damaged
section with a new section. Sediment accumulated
behind silt fence should be removed, as needed to
maintain BMP effectiveness, typically before it
reaches a depth of 6 inches.
Silt fence may be removed when the upstream area
has reached final stabilization.
Silt Fence (SF) SC-1
November 2010 Urban Drainage and Flood Control District SF-3
Urban Storm Drainage Criteria Manual Volume 3
SC-1 Silt Fence (SF)
SF-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL) SC-2
November 2010 Urban Drainage and Flood Control District SCL-1
Urban Storm Drainage Criteria Manual Volume 3
Photographs SCL-1 and SCL-2. Sediment control logs used as 1) a
perimeter control around a soil stockpile; and, 2) as a "J-hook"
perimeter control at the corner of a construction site.
Description
A sediment control log is a linear roll
made of natural materials such as
straw, coconut fiber, or other fibrous
material trenched into the ground and
held with a wooden stake. Sediment
control logs are also often referred to
as "straw wattles." They are used as a
sediment barrier to intercept sheet flow
runoff from disturbed areas.
Appropriate Uses
Sediment control logs can be used in
the following applications to trap
sediment:
As perimeter control for stockpiles
and the site.
As part of inlet protection designs.
As check dams in small drainage
ditches. (Sediment control logs
are not intended for use in
channels with high flow
velocities.)
On disturbed slopes to shorten flow
lengths (as an erosion control).
As part of multi-layered perimeter control along a receiving water such as a stream, pond or wetland.
Sediment control logs work well in combination with other layers of erosion and sediment controls.
Design and Installation
Sediment control logs should be installed along the contour to avoid concentrating flows. The maximum
allowable tributary drainage area per 100 lineal feet of sediment control log, installed along the contour, is
approximately 0.25 acres with a disturbed slope length of up to 150 feet and a tributary slope gradient no
steeper than 3:1. Longer and steeper slopes require additional measures. This recommendation only
applies to sediment control logs installed along the contour. When installed for other uses, such as
perimeter control, it should be installed in a way that will not
produce concentrated flows. For example, a "J-hook"
installation may be appropriate to force runoff to pond and
evaporate or infiltrate in multiple areas rather than concentrate
and cause erosive conditions parallel to the BMP.
Sediment Control Log
Functions
Erosion Control Moderate
Sediment Control Yes
Site/Material Management No
SC-2 Sediment Control Log (SCL)
SCL-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Although sediment control logs initially allow runoff to flow through the BMP, they can quickly become
a barrier and should be installed is if they are impermeable.
Design details and notes for sediment control logs are provided in Detail SCL-1. Sediment logs must be
properly trenched and staked into the ground to prevent undercutting, bypassing and displacement. When
installed on slopes, sediment control logs should be installed along the contours (i.e., perpendicular to
flow).
Improper installation can lead to poor performance. Be sure that sediment control logs are properly
trenched, anchored and tightly jointed.
Maintenance and Removal
Be aware that sediment control logs will eventually degrade. Remove accumulated sediment before the
depth is one-half the height of the sediment log and repair damage to the sediment log, typically by
replacing the damaged section.
Once the upstream area is stabilized, remove and properly dispose of the logs. Areas disturbed beneath
the logs may need to be seeded and mulched. Sediment control logs that are biodegradable may
occasionally be left in place (e.g., when logs are used in conjunction with erosion control blankets as
permanent slope breaks). However, removal of sediment control logs after final stabilization is typically
recommended when used in perimeter control, inlet protection and check dam applications.
Sediment Control Log (SCL) SC-2
November 2010 Urban Drainage and Flood Control District SCL-3
Urban Storm Drainage Criteria Manual Volume 3
SC-2 Sediment Control Log (SCL)
SCL-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL) SC-2
November 2010 Urban Drainage and Flood Control District SCL-5
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph VTC-1. A vehicle tracking control pad constructed with
properly sized rock reduces off-site sediment tracking.
Description
Vehicle tracking controls provide
stabilized construction site access where
vehicles exit the site onto paved public
roads. An effective vehicle tracking
control helps remove sediment (mud or
dirt) from vehicles, reducing tracking onto
the paved surface.
Appropriate Uses
Implement a stabilized construction
entrance or vehicle tracking control where
frequent heavy vehicle traffic exits the
construction site onto a paved roadway. An
effective vehicle tracking control is
particularly important during the following conditions:
Wet weather periods when mud is easily tracked off site.
During dry weather periods where dust is a concern.
When poorly drained, clayey soils are present on site.
Although wheel washes are not required in designs of vehicle tracking controls, they may be needed at
particularly muddy sites.
Design and Installation
Construct the vehicle tracking control on a level surface. Where feasible, grade the tracking control
towards the construction site to reduce off-site runoff. Place signage, as needed, to direct construction
vehicles to the designated exit through the vehicle tracking control. There are several different types of
stabilized construction entrances including:
VTC-1. Aggregate Vehicle Tracking Control. This is a coarse-aggregate surfaced pad underlain by a
geotextile. This is the most common vehicle tracking control, and when properly maintained can be
effective at removing sediment from vehicle tires.
VTC-2. Vehicle Tracking Control with Construction Mat or Turf Reinforcement Mat. This type of
control may be appropriate for site access at very small construction sites with low traffic volume over
vegetated areas. Although this application does not typically remove sediment from vehicles, it helps
protect existing vegetation and provides a stabilized entrance.
Vehicle Tracking Control
Functions
Erosion Control Moderate
Sediment Control Yes
Site/Material Management Yes
SM-4 Vehicle Tracking Control (VTC)
VTC-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph VTC-2. A vehicle tracking control pad with wheel wash
facility. Photo courtesy of Tom Gore.
VTC-3. Stabilized Construction Entrance/Exit with Wheel Wash. This is an aggregate pad, similar
to VTC-1, but includes equipment for tire washing. The wheel wash equipment may be as simple as
hand-held power washing equipment to more advance proprietary systems. When a wheel wash is
provided, it is important to direct wash water to a sediment trap prior to discharge from the site.
Vehicle tracking controls are sometimes installed in combination with a sediment trap to treat runoff.
Maintenance and Removal
Inspect the area for degradation and
replace aggregate or material used for a
stabilized entrance/exit as needed. If the
area becomes clogged and ponds water,
remove and dispose of excess sediment
or replace material with a fresh layer of
aggregate as necessary.
With aggregate vehicle tracking controls,
ensure rock and debris from this area do
not enter the public right-of-way.
Remove sediment that is tracked onto the
public right of way daily or more
frequently as needed. Excess sediment
in the roadway indicates that the
stabilized construction entrance needs
maintenance.
Ensure that drainage ditches at the
entrance/exit area remain clear.
A stabilized entrance should be removed only when there is no longer the potential for vehicle tracking to
occur. This is typically after the site has been stabilized.
When wheel wash equipment is used, be sure that the wash water is discharged to a sediment trap prior to
discharge. Also inspect channels conveying the water from the wash area to the sediment trap and
stabilize areas that may be eroding.
When a construction entrance/exit is removed, excess sediment from the aggregate should be removed
and disposed of appropriately. The entrance should be promptly stabilized with a permanent surface
following removal, typically by paving.
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-3
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTC)
VTC-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-5
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTC)
VTC-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
APPENDIX D
Reporting Chemical Spills in Colorado
REPORTING
ENVIRONMENTAL RELEASES
IN COLORADO
Hazardous Materials and Waste Management Division
(303) 692-3300
January 2009
Purpose of this Guidance
This guidance is intended to provide an overview of various reporting
requirements for a variety of releases to the environment. Please check all of
the possible requirements for reporting. This guidance does not cover all
potential release scenarios. This guidance is not intended to modify or replace
statutes or regulations, which undergo periodic revisions. In the event of a
conflict between this guidance and statutes or regulations, the statutes and
regulations govern.
Some reporting requirements are complex and overlapping, and this guidance
does not go into details of all situations. If a release situation is not described
in this guidance, or if clarification is desired, please obtain an official
interpretation from the governing agency enforcing the statute or regulation.
i
Table of Contents
Contact Information......................................................................................................................................ii
Colorado Environmental Release Reporting..................................................................................................1
A. Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)...................1
B. Emergency Planning and Community Right-to-Know Act (EPCRA).................................................3
Reportable Quantities Under CERCLA and EPCRA............................................................................4
Exceptions and Exclusions.....................................................................................................................5
C. Resource Conservation and Recovery Act (RCRA) ............................................................................7
D. Radiation Control.................................................................................................................................9
E. Clean Water Act ...................................................................................................................................9
F. Safe Drinking Water Act ....................................................................................................................10
G. Clean Air Act .....................................................................................................................................10
H. Underground Storage Tanks (USTs) and Aboveground Storage Tanks (ASTs)...............................11
I. Hazardous Materials Transportation....................................................................................................12
J. Oil and Gas Exploration and Production.............................................................................................15
K. Polychlorinated Biphenyls.................................................................................................................16
Abbreviations & Definitions........................................................................................................................17
ii
Contact Information
Release Reporting Numbers
National Response Center (NRC) 1 (800) 424-8802
24-hour reporting
Colorado Environmental Release and Incident Reporting Line 1 (877) 518-5608
24-hour reporting
Radiation Incident Reporting Line (303) 877-9757
24-hour reporting
Colorado State Patrol (303) 239-4501
24-hour reporting
US EPA Region 8 Emergency Response Spill Report Line 1 (800) 227-8914
24-hour reporting
Division of Oil and Public Safety (Dept. of Labor and Employment) (303) 318-8547
Fax (303) 318-8546
Oil and Gas Conservation Commission (Dept. of Natural Resources) (303) 894-2100
Division of Reclamation, Mining and Safety (Dept. of Natural Resources) (303) 866-3567
Colorado Public Utilities Commission Gas Pipeline Safety Section (303) 894-2851
(Dept. of Regulatory Agencies)
Local Emergency Planning Committee (Dept. of Local Affairs) (720) 852-6603
Business hours only - to obtain a list of LEPC contacts
Colorado Department of Public Health and Environment
Mailing Address:
Colorado Department of Public Health and Environment
4300 Cherry Creek Drive South
Denver, CO 80246-1530
Office Hours:
Monday – Friday, except holidays 8:00 am – 5:00 pm
Environmental Divisions
Air Pollution Control Division (303) 692-3100
Website http://www.cdphe.state.co.us/ap/
Email comments.apcd@state.co.us
Consumer Protection Division (303) 692-3620
Website http://www.cdphe.state.co.us/cp/
Email comments.cpd@state.co.us
Hazardous Materials and Waste Management Division (303) 692-3300
Website http://www.cdphe.state.co.us/hm/
Email comments.hmwmd@state.co.us
Water Quality Control Division (303) 692-3500
Website http://www.cdphe.state.co.us/wq/
Email comments.wqcd@state.co.us
Reporting Environmental Releases in Colorado January 2009
Colorado Environmental Release Reporting
Additional reporting requirements
may be found in permits, licenses,
registrations, contingency and
pollution prevention plans, fire
codes, and local ordinances.
When a release of a hazardous material or other substance occurs to the environment, there are a
number of reporting and notification requirements that must be followed by the company or
individual responsible for the release. Environmental releases must be reported to the appropriate
authorities so that necessary response actions are taken in a timely fashion to ensure maximum
protection of human health and the environment.
However, taking appropriate and timely response actions
do not relieve you of your responsibility to report a release.
In addition, the responsible party is always liable for any
damages that may result from a release, and is responsible
for appropriate clean up actions whether or not the release
is required to be reported.
There is no penalty for over-reporting, but there are for failing to report a release. If you are unsure
if a release needs to be reported, the Colorado Department of Public Health and Environment (the
Department) recommends that releases be reported immediately even if the quantity of the release
has not yet been determined. Your follow-up report will provide details that explain why the
release was or was not reportable.
“Release” includes any spilling, leaking, pumping, pouring, emitting, emptying, discharging,
injecting, escaping, leaching, dumping, or disposing into the environment, including abandonment
or discarding of barrels, containers, and other closed receptacles containing any hazardous
substance, pollutant, or contaminant.
Most spills and releases are
covered by more than one
reporting requirement, and all
requirements must be met.
"Environment" is generally defined as any surface water, ground water, drinking water supply, land
surface, subsurface strata, or ambient air. Releases into containment devices and those completely
contained within a building or other structure are not releases into the environment as long as the
hazardous substance does not volatilize into the ambient air or
otherwise have the potential to enter the environment (e.g.,
through the floor or cracks in the floor). Releases of a substance
into a storm drain or sewer, or onto a parking lot or roadway, are
considered to be releases to the environment.
Release reporting requirements are based on the type of material released and/or the situation under
which the release occurred. Additional reporting requirements may be found in permits, licenses,
registrations, contingency and pollution prevention plans, fire codes, and local ordinances. Please
check all of the possible requirements for reporting. Most spills and releases are covered by more
than one reporting requirement, and ALL requirements must be met. Enforcement action may be
taken against those who fail to provide required notifications or reports.
A. Comprehensive Environmental Response, Compensation and Liability Act
(CERCLA)
The Comprehensive Environmental Response, Compensation and Liability Act, commonly known
as Superfund or CERCLA, provided broad Federal authority to respond directly to releases or
threatened releases of hazardous substances that may endanger public health or the environment.
This Act also enabled revision of the National Contingency Plan, which provides the guidelines and
1
Reporting Environmental Releases in Colorado January 2009
procedures needed to respond to releases and threatened releases of hazardous substances,
pollutants, or contaminants.
Under CERCLA, the US EPA was directed to establish reporting quantities for all hazardous
substances. The term "hazardous substance" is defined in CERCLA Section 101(14). These are
defined by reference to substances that are listed or designated under other environmental statutes.
They include:
all hazardous air pollutants (HAPs) listed under Section 112(b) of the Clean Air Act (CAA).
Radio-nuclides are hazardous substances because EPA designated them generically as
hazardous air pollutants under Section 112(b) of the Clean Air Act. Even though the source
of their listing is the Clean Air Act, releases of radionuclides to all media, not just to air, are
covered by CERCLA's reporting requirements.
toxic pollutants that are subject to pretreatment standards under Section 307(a) of the Clean
Water Act (CWA) and toxic pollutants that present an imminent danger to public health
when discharged to waters of the United States as designated under Section 311(b)(2)(A) of
the Clean Water Act. All Clean Water Act hazardous substances are CERCLA hazardous
substances, but only some CERCLA hazardous substances are Clean Water Act hazardous
substances.
wastes that are regulated as listed and/or characteristic
hazardous wastes under the Resource Conservation and
Recovery Act (RCRA). This includes thousands of
hazardous wastes that are not specifically listed but that
exhibit one or more of the characteristics of ignitability,
reactivity, corrosivity or toxicity. A material is
considered to be a release of a CERCLA hazardous
substance if the material was a waste prior to release, or if
the substance is not cleaned up for reuse and thus must be
disposed of as a RCRA hazardous waste after release.
Report releases at or above
the reportable quantity (RQ)
within 24 hours:
Hazardous air pollutants
under Section 112(b) of
Clean Air Act
Toxic pollutants under
Section 307(a) or under
Section 311(b)(2)(A) of
Clean Water Act
RCRA hazardous wastes
Elements, compounds or
substances under Section
102 of CERCLA
any element, compound, mixture solution or substance
designated under Section 102 of CERCLA that may
present substantial danger to public health or welfare or
the environment.
any imminently hazardous chemical substance or mixture that EPA has taken action against
under Section 7 of the Toxic Substances Control Act (TSCA). Any hazardous chemical
substance or mixture that EPA has taken action against under this Act would automatically
become a hazardous substance. To date, EPA hasn't designated any hazardous substances
under the Toxic Substances Control Act.
The person in charge of a facility or vessel must immediately report a release to the National
Response Center (NRC) as soon as they have knowledge of a release to the environment of a
CERCLA hazardous substance at or above the reportable quantity assigned to that substance within
a 24-hour period. If the release is a mixture or solution of hazardous substances, it must be reported
if the reportable quantity for any hazardous constituents is met or exceeded. If the responsible party
doesn't know the quantity of one or more of the hazardous constituents contained in a mixture or
solution, they must report the release if the total amount of the mixture or solution released equals
or exceeds the reportable quantity for the hazardous constituent with the lowest reportable quantity.
Reporting is also required if a non-CERCLA substance is released into the environment and rapidly
degrades into a CERCLA hazardous substance in an amount that equals or exceeds the reportable
quantity for the newly formed CERCLA hazardous substance.
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Reporting Environmental Releases in Colorado January 2009
These notification and reporting requirements are included in 40 CFR Part 302. A list of CERCLA
hazardous substances is included in Table 302.4 of these regulations.
B. Emergency Planning and Community Right-to-Know Act (EPCRA)
The Superfund Amendments and Reauthorization Act of 1986 reauthorized the Comprehensive
Response, Compensation and Liability Act to continue cleanup activities around the country.
Several amendments, definitions, clarifications and technical requirements were added to the
legislation, including additional enforcement authorities. Title III of the Superfund Amendments
also authorized the Emergency Planning and Community Right-to-Know Act (EPCRA), which
established the community's right to information about the chemicals that are stored, used at and/or
released from local facilities. It also established a framework for developing emergency plans for
responding to releases and reporting requirements for facilities.
A list of EPCRA threshold
planning quantities (TPQ) is
included in 40 CFR Part
355 Appendices A & B.
Under this Act, owners or operators of facilities at which a
hazardous substance or extremely hazardous substance is produced,
used or stored must provide immediate notification to the National
Response Center (NRC), the State Emergency Response
Commission (SERC) and the affected Local Emergency Planning
Committee (LEPC) when there is a release of a hazardous substance or extremely hazardous
substance with the potential to affect off-site persons that equals or exceeds its reportable quantity
within a 24-hour period. If the release is an EPCRA extremely hazardous substance, but not a
CERCLA hazardous substance, then only the SERC and LEPC need to be notified. Note – there
may be more than one SERC and/or LEPC potentially affected by a release. Don’t wait until there
is a release to contact the SERC and LEPC(s) to ensure that the correct contacts will be made in the
event of a spill. For a list of LEPCs, contact the Colorado Department of Local Affairs.
The owner or operator of the facility must report a release as soon as they know about it. In
addition to immediate telephone notification, the responsible party must also send a follow-up
written report as soon as practicable after the release to both the State Emergency Response
Commission (in this case, to the Colorado Department of Public Health and Environment) and the
Local Emergency Planning Committee. This report must describe the release, associated response
actions taken, and any known or anticipated health risks associated with the release.
A table of CERCLA reportable quantities
(RQ)isincludedin40CFRSection 302.4.
Although EPCRA requires notification only for
releases that have the potential to affect persons beyond
the facility boundary, EPA and the Colorado
Department of Public Health and Environment strongly encourage facilities to report onsite releases
if there is ANY potential for the release to migrate offsite. The burden of proof is on the facility to
show that any release into the environment of a reportable quantity or more of a hazardous
substance or extremely hazardous substance has NO POTENTIAL for offsite migration (e.g., via
groundwater, the wind or getting tracked offsite by workers and vehicles).
The State Emergency Response Commission (SERC) in Colorado is called the Colorado
Emergency Planning Commission (CEPC). It consists of representatives of the Colorado
Department of Public Health and Environment – Hazardous Materials and Waste Management
Division, the Colorado Department of Local Affairs – Colorado Division of Emergency
Management and the Division of Local Government, the Colorado Department of Public Safety –
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Reporting Environmental Releases in Colorado January 2009
Fire Safety Division, and the Colorado State Patrol. The Commission also includes representatives
of affected industries, local governments, public interest or community groups and the Local
Emergency Planning Committee (LEPC) community. The Colorado Department of Public Health
and Environment represents the Commission for reporting purposes.
Reportable Quantities Under CERCLA and EPCRA
All reportable quantities are listed in pounds (except radionuclides, which are in curies). Congress
established a one pound reportable quantity for all hazardous substances and extremely hazardous
substances until EPA could evaluate each substance and adjust the reportable quantity to a level
more appropriate for the substance. During this assessment, each hazardous substance was
evaluated for six primary criteria: aquatic toxicity, mammalian toxicity, ignitability, reactivity,
chronic toxicity, and potential carcinogenicity. Reportable quantities for CERCLA hazardous
substances are listed in 40 CFR Section 302.4.
EPCRA extremely hazardous substances that are also hazardous substances under CERCLA have
the same reportable quantity that is applicable under CERCLA. If not also listed as a CERCLA
hazardous substance, extremely hazardous substances have a reportable quantity equal to the
EPCRA threshold planning quantity (TPQ) for that substance. The threshold planning quantity is
the quantity designated for each chemical in 40 CFR Part 355 Appendices A and B that triggers
notification by facilities to the State Emergency Response Commission that those facilities are
subject to emergency planning requirements.
For convenience, reportable quantities for hazardous substances and extremely hazardous
substances can also be found in the EPA List of Lists (EPA 550-B-01-003). Bear in mind that
because this document is only updated periodically, it may not contain recently added substances.
EPCRA extremely hazardous substances that
are also CERCLA hazardous substances have
the same RQ as under CERCLA.
EPCRA extremely hazardous substances that
are not listed under CERCLA have an RQ
equal to their TPQ under EPCRA.
All concurrent releases of the same substance from a single facility must be combined to determine
if a reportable quantity has been met or exceeded. Releases of different substances from a single
facility should not be combined for purposes of determining if the releases need to be reported.
Rather, each substance should be evaluated separately to determine if one or more reportable
quantities have been met or exceeded. For example, spilling a mixture containing half the
reportable quantity of one hazardous substance and
half the reportable quantity of another hazardous
substance does not trigger the reporting
requirement. Releases from separate facilities
should be treated as separate releases and should
not be combined to determine if a reportable
quantity has been met or exceeded.
Mixtures
Most hazardous substances and extremely hazardous substances are not used or stored in pure form,
but are mixtures or solutions. If a mixture of hazardous substances or extremely hazardous
substances is released and the concentration of all hazardous substances and extremely hazardous
substances in the mixture is known, then you must calculate the amount of each hazardous
substance and extremely hazardous substance that has been released. If there is more than one
hazardous substance or extremely hazardous substance in a mixture, you must check the reportable
quantity for each substance. The release must be reported if the reportable quantity for any
4
Reporting Environmental Releases in Colorado January 2009
hazardous substance or extremely hazardous substance has been met or exceeded. If the
concentrations of the hazardous substances or extremely hazardous substances in the mixture are
not known, then the release must be reported when the total amount of the mixture released equals
or exceeds the reportable quantity for the constituent with the lowest reportable quantity.
Radionuclides
Releases of radionuclides in a mixture are additive. These releases are subject to reporting:
if each radionuclide in a released mixture or solution is known, then the ratio between the
quantity released and the reportable quantity for the radionuclide must be determined for
each radionuclide. If the sum of the ratios for the radionuclides in the mixture or solution
released is equal to or greater than one, it must be reported.
if all of the radionuclides in the mixture are known but the quantity released of one or more
of the radionuclides is unknown, it must be reported if the total quantity released is equal to
or greater than the lowest reportable quantity of any one radionuclide in the mixture.
if one or more radionuclides in the mixture is unknown, it must be reported if the total
quantity released is equal to or greater than either one curie or the lowest reportable quantity
of any of the known radionuclides in the mixture (whichever is lower).
Exceptions and Exclusions
Petroleum Products
A release of a petroleum product
containing a reportable quantity of
an EPCRA extremely hazardous
substance is reportable.
Under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA),
petroleum products are excluded from the definition of hazardous substance. "Petroleum product"
includes crude oil, any fraction of crude oil that is not specifically listed as a hazardous substance,
natural and synthetic gases, and mixtures of natural and synthetic gases. EPA interprets petroleum
as including those amounts of hazardous substances, like
benzene, that are indigenous to crude oil or its fractions or
that are normally added during the refining process.
Hazardous substances added to the petroleum or increased
in concentration solely as a result of contamination during
use are not included in the petroleum exclusion.
Unlike the petroleum exclusion under CERCLA, extremely hazardous substances that are naturally
occurring in petroleum products or that are normally added during refining are subject to reporting
under the Emergency Planning and Community Right-to-Know Act (EPCRA). Therefore, a release
of a petroleum product containing a reportable quantity of one or more extremely hazardous
substances is reportable to the Colorado Emergency Planning Commission (CERC) and the Local
Emergency Planning Committee (LEPC) if a reportable quantity is met or exceeded.
Note: releases of oil and petroleum to water are also covered
under the Clean Water Act (Section E of this document).
Releases of petroleum from regulated storage tanks are covered
under the Colorado storage tank regulations (Section H of this
document).
The responsible party is always
responsible for appropriate clean
up actions whether or not the
release is required to be reported.
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Reporting Environmental Releases in Colorado January 2009
Metals
Under normal handling and use, solid forms of most metals present few health hazards. Metal fines
and metal dust may cause irritation of the eyes, skin, and respiratory system, and fine particles of
certain metals, including antimony, arsenic, beryllium, cadmium, chromium, copper, lead, nickel,
selenium, silver, thallium, or zinc, dispersed in the air can be an explosion and/or health hazard.
EPA has determined that releases of these metals with particles larger than 100 micrometers would
not normally require response action due to the unlikely inhalation of such large particles.
However, notification of the release of a reportable quantity of antimony, arsenic, beryllium,
cadmium, chromium, copper, lead, nickel, selenium, silver, thallium, or zinc is required if the mean
diameter of the particles released is less than 100 micrometers (0.004 inches). An exception to this
is a release of a metal classified as a radionuclide, which does not qualify for this exemption even if
the particles meet the size criteria.
Naturally Occurring Radionuclides
Notification of the release of naturally occurring radionuclides from large land holdings, like parks
or golf courses, is not required. EPA broadened this exemption to include land containing ore
reserves even if the undisturbed ores contain elevated natural concentrations of radionuclides, and
to land disturbance activities including farming, construction, and disturbance incidental to
extraction activities at all mines except uranium, phosphate, tin, zircon, hafnium, vanadium,
monazite, and rare earth mines. Land disturbance incidental to extraction activities includes land
clearing, overburden removal and stockpiling, and excavating, handling, transporting and storing
ores and other raw materials. Land disturbance incidental to extraction also includes replacing
materials in mined-out areas as long as those materials have not been processed and don't contain
elevated radionuclide concentrations. Notification of the release of naturally occurring
radionuclides from sites where coal and coal ash (fly ash, bottom ash, boiler slag) are stored or
disposed is also not required.
Federally Permitted Releases
Releases that are regulated under one or more of the following programs are exempt from CERCLA
and EPCRA reporting requirements:
permitted discharges under the National Pollutant Discharge Elimination System (NPDES);
permitted dredge and fill discharges under Section 404 of the Clean Water Act;
permitted and interim status hazardous waste units under the Resource Conservation and
Recovery Act;
permitted discharges under the Marine Protection, Research and Sanctuaries Act;
permitted injection of fluids under the Underground Injection Control (UIC) program in
accordance with the Safe Drinking Water Act;
air emissions subject to permit or control regulations under the Clean Air Act;
permitted or allowed injection of fluids to develop crude oil or natural gas supplies;
discharges of contaminants to Publicly Owned Treatment Works (POTW) if in compliance
with pretreatment requirements under the Clean Water Act;
releases of certain nuclear materials if in compliance with a license, permit, regulation or
order issued in accordance with the Atomic Energy Act.
Registered Pesticides
The normal application of a pesticide product registered under the Federal Insecticide, Fungicide
and Rodenticide Act (FIFRA) is exempt from CERCLA and EPCRA reporting. This exemption
includes the handling and storage of the product by an agricultural producer, but does not include
6
Reporting Environmental Releases in Colorado January 2009
any spills of the pesticide. Pesticide spills are reportable if the amount spilled meets or exceeds the
reportable quantity.
Continuous Releases
A continuous release is a release that occurs without interruption or abatement or that is routine,
anticipated, intermittent, and incidental to normal operations or treatment processes. When a
release of this type occurs, officials do not have to be notified each time. Instead, the facility can
report it as a continuous release to the National Response Center, the Colorado Emergency Planning
Commission and the Local Emergency Planning Committee(s) by telephone. This should be
followed by a written report submitted to EPA Region 8, the Colorado Department of Public Health
and Environment and the Local Emergency Planning Committee within 30 days of the initial
telephone call. The written report should provide information about the source, composition, and
normal range of the release. Periodic follow-up reports may also be required. Any release that
exceeds the normal range (called a “statistically significant increase”) must be reported immediately
to the National Response Center, the Colorado Department of Public Health and Environment and
the Local Emergency Planning Committee as if they were new release events. The normal range is
determined by the amount of a hazardous substance released over any 24-hour period under normal
operating conditions during the preceding year. Only releases that are both continuous and stable in
quantity and rate can be included in the normal range.
Continuous release of an extremely hazardous substance that is not a CERCLA hazardous substance
need only be reported to the Colorado Department of Public Health and Environment and the Local
Emergency Planning Committee. A written report should also be sent to these two agencies within
30 days and any statistically significant increases in the release should be reported to both agencies.
Periodic follow-up reports may also be required.
C. Resource Conservation and Recovery Act (RCRA)
All Resource Conservation and Recovery Act (RCRA) listed and characteristic hazardous wastes
are designated as hazardous substances under the Comprehensive Environmental Response,
Compensation and Liability Act (CERCLA). For more information on listed and characteristic
hazardous wastes, please review the Hazardous Waste Identification Guidance Document from the
Hazardous Materials and Waste Management Division (http://www.cdphe.state.co.us/hm/hwid.pfd).
The reportable quantity for F- and K-listed hazardous wastes is based on the hazardous waste code.
If the composition and concentrations of all included constituents is not known, the reportable
quantity would be as listed for the waste code in 40 CFR Section 302.4. If the waste is analyzed
and the concentrations of ALL of its hazardous constituents are identified, then reportable quantities
of the specific constituents can be used to determine when reporting is required. For example, if a
release of an F005 listed hazardous waste occurred and the concentrations of the constituents
making up the waste were unknown, the reportable quantity would be 100 pounds. If it were known
that the F005 waste was comprised of 50% toluene (reportable quantity 1000 pounds) and 50%
methyl ethyl ketone (reportable quantity 5000 pounds), then the release would be reported when
2000 pounds of the mixture were released. [Since the reportable quantity for toluene is less than
that for methyl ethyl ketone, the amount of toluene released will determine when the release must
be reported. Since the mixture is 50% toluene, it would take 2000 pounds of the mixture to meet
the reportable quantity of 1000 pounds for toluene.]
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Reporting Environmental Releases in Colorado January 2009
P- and U-listed hazardous wastes are reported based on the reportable quantity for the hazardous
substance that the waste is listed for. For example, the reportable quantity for hazardous waste code
U122 (formaldehyde) is 100 pounds. For the purposes of release reporting, it doesn't matter if the
formaldehyde is used or unused or is the "sole active ingredient" in order to be reportable. (Related
note: Colorado's hazardous waste regulations (6 CCR 1007-3) do not include the footnote regarding
sole active ingredients. In Colorado, chemicals may have more than one active ingredient and still
meet the listing description.)
All RCRA listed and characteristic
hazardous wastes are designated
as hazardous substances under
CERCLA.
Unlisted hazardous wastes exhibiting the characteristics of
ignitability, corrosivity and/or reactivity have a reportable
quantity of 100 pounds unless the concentrations of all the
constituents in the waste are known. If the waste is analyzed
and the concentrations of ALL its hazardous constituents are
identified, the reportable quantities of the specific constituents should be used to determine when
reporting is required. For example, a corrosive-only waste of unknown composition has a
reportable quantity of 100 pounds. If the waste is analyzed to determine that it was a 50% solution
of hydrochloric acid in water, then the reportable quantity of the solution would be 10,000 pounds.
[The reportable quantity for hydrochloric acid is 5000 pounds. Therefore it would take 10,000
pounds of the 50% solution to meet the reportable quantity for hydrochloric acid.]
Unlisted hazardous wastes that exhibit toxicity have reportable quantities specific to the constituent
on which the characteristic of toxicity is based. The reportable quantity applies to the waste itself,
not just to the toxic contaminant. If an unlisted hazardous waste exhibits toxicity on the basis of
more than one contaminant, the reportable quantity for the waste is the lowest of the reportable
quantities for those contaminants. For example, if a waste exhibits toxicity characteristics for the
heavy metals lead (D008) and selenium (D010), with reportable quantities of 10 and 100 pounds
respectively, the reportable quantity would be 10 pounds of the waste, or the lower of the two
reportable quantities. If a waste exhibits a toxicity characteristic and one or more other hazardous
waste characteristics, the reportable quantity for that waste is the lowest of the applicable reportable
quantities.
These notification and reporting requirements are included in 40 CFR Part 302.
Permitted and Interim Status Treatment, Storage and Disposal Facilities and Large
Quantity Generators of Hazardous Waste
Large quantity generators of hazardous waste and hazardous waste treatment, storage and disposal
facilities (TSDF) are required to have and implement a contingency plan that describes the actions
facility personnel must take in response to fires, explosions, or any unplanned sudden or non-
sudden release of hazardous waste or hazardous waste constituents to air, soil, surface water or
groundwater at the facility. Whenever there is an imminent or actual emergency situation,
appropriate State and local agencies with designated response roles as described in the contingency
plan must be notified immediately. Appropriate local authorities and the National Response Center
or government official designated as the regional on-scene coordinator must be notified
immediately if the facility's emergency coordinator determines that the facility has had a release,
fire, or explosion that could threaten human health or the environment outside the facility. A
treatment, storage, and disposal facility's permit generally requires reporting to the Colorado
Department of Public Health and Environment – Hazardous Materials and Waste Management
Division of any release, fire or explosion, even if the amount of the release is less than an otherwise
reportable quantity.
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Reporting Environmental Releases in Colorado January 2009
The Department and local authorities must be notified when the facility is back in compliance and
ready to resume operations. In addition, the facility must send a written report to both the EPA
Regional Administrator and the Colorado Department of Public Health and Environment within 15
days of any incident that requires implementation of the facility contingency plan.
In the case of a release of hazardous waste stored in tanks, the facility must notify the Hazardous
Materials and Waste Management Division within 24 hours of a release to the environment of more
than one pound. A leak or spill of hazardous waste that is less than or equal to one pound from a
tank or tank system does not need to be reported if the release is immediately contained and cleaned
up. Within 30 days of the release, a written report must be submitted to the Division.
These notification and reporting requirements are included in 6 CCR 1007-3 Sections 264.56 and
265.56 and Sections 264.196(d) and 265.196(d).
D. Radiation Control
Releases of radionuclides are
reportable under CERCLA.
The state of Colorado has specific reporting requirements for stolen, lost or missing licensed or
registered sources of radiation. Each licensee or registrant must report to the Colorado Department
of Public Health and Environment by telephone in the event of lost, stolen or missing licensed or
registered radioactive materials, a lost, stolen, or missing radiation machine, releases of radioactive
materials, contamination events, and fires or explosions involving radioactive materials. Incidents
should be reported to the Radiation Incident Reporting Line. Based on the severity of the event,
notification may be required immediately, within 24 hours or within 30 days. A follow-up written
report must also be submitted to the Department within 30
days of initial notification. The licensee must also report any
additional substantive information regarding a loss or theft
incident within 30 days after learning of such information.
These release and notification requirements are contained in 6 CCR 1007-1 Sections 4.51 - 4.53.
E. Clean Water Act
The Clean Water Act (CWA) requires the person in charge of a facility or vessel to make an
immediate report to the National Response Center of discharges of harmful quantities of oil to
navigable waters as soon as they have knowledge of the release. In this case, oil means oil of any
kind or in any form including, but not limited to, petroleum, fuel oil, sludge, oil refuse, and oil
mixed with wastes other than dredged spoil. Discharges of oil that violate applicable water quality
standards and those that cause a film, sheen or discoloration of the surface of the water or adjoining
shorelines, or cause a sludge or emulsion to be deposited beneath the surface of the water or on
adjoining shorelines must be reported. In effect, this means that any discharge of oil to waters of
the United States must be reported to the National Response Center. These release and notification
requirements are contained in 40 CFR Part 110.
The Clean Water Act (CWA) also requires the person in charge of a facility or vessel to report to
the National Response Center the discharge of a designated hazardous substance from the vessel or
facility to waters of the United States in quantities that equal or exceed the reportable quantity as
soon as they have knowledge of the release. Under the Act, the US EPA was directed to establish
reporting quantities for all hazardous substances listed in Table 116.4 A and B (40 CFR Part 116),
which were designated as hazardous substances in accordance with Section 311(b)(2)(A) of the
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Reporting Environmental Releases in Colorado January 2009
Clean Water Act. This designation includes any isomers and hydrates as well as any solutions and
mixtures containing these substances. Each of these substances is included in the CERCLA list of
hazardous substances (40 CFR Part 302 Table 302.4) and is assigned the reportable quantity listed
in Table 302.4 for that substance. These release and notification requirements are contained in 40
CFR Parts 116 and 117.
Under the Clean Water Act, anyone that has a National Pollutant Discharge Elimination System
(NPDES) permit must report to the National Response Center within 24 hours of becoming aware
of any unanticipated bypasses or upsets that cause an exceedance of the effluent limits in their
permit and any violation of their maximum daily discharge limits for any pollutant listed in the
permit. A written report must be provided within five days. Other instances of noncompliance
must be reported when monitoring reports are submitted.
The Clean Water Act also requires all industrial users of Publicly Owned Treatment Works
(POTWs) to notify their treatment plant immediately if they have a discharge that could cause
problems at the treatment plant.
These notification and reporting requirements are included in 40 CFR Parts 122 and 403.
State Requirements
A spill of any chemical, oil, petroleum product, sewage, etc., which may enter waters of the state of
Colorado (which include surface water, ground water, and dry gullies and storm sewers leading to
surface water) must be reported immediately to the Colorado Department of Public Health and
Environment. Any accidental discharge to the sanitary sewer system must be reported immediately
to the local sewer authority and the affected wastewater treatment plant. If a release occurs at a
mining operation, the Division of Reclamation, Mining and Safety should also be notified.
For more information regarding State reporting requirements under 25-8-601(2) CRS, please refer
to the “Guidance for Reporting Spills under the Colorado Water Quality Control Act and Colorado
Discharge Permits” adopted by the Water Quality Control Division. This policy is available at
http://www.cdphe.state.co.us/op/wqcc/Resources/Guidance/spillguidance.pdf.
F. Safe Drinking Water Act
The owner or operator of a public water system (community water systems, non-transient non-
community water systems, and transient non-community water systems) must immediately report
any credible threat to the water supply system to the Colorado Environmental Release and Incident
Reporting Line and to the local emergency manager. The local emergency manager may be the
county sheriff or a member of the fire department. A list of local emergency managers is available
from the Colorado Department of Local Affairs.
G. Clean Air Act
Hazardous air pollutants (HAPs) listed in Section 112(b) of the Clean Air Act (CAA) are designated
as hazardous substances under the Comprehensive Environmental Response, Compensation and
Liability Act (CERCLA). Hazardous air pollutants are known or suspected to cause cancer or other
serious health effects or adverse environmental effects. Health effects can include immunological,
neurological, reproductive, developmental, and respiratory problems. In some cases, hazardous air
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Reporting Environmental Releases in Colorado January 2009
pollutants can be deposited onto soils or other surfaces, where they are taken in by plants and
animals and can accumulate in organic tissue or pass up the food chain due to the inability of
organisms to process the substance.
The release (or air emission) of a hazardous air pollutant that is allowed and less than any limit
specified in a facility's air permit is considered to be a federally permitted release. If the facility
releases more than is allowed under its air permit within a 24 hour period, the facility must report
the release if the quantity released exceeded the facility's permitted level by a reportable quantity or
more. For example, if a facility has an air permit that allows the release of 30 pounds of a
hazardous substance and that substance has a reportable quantity of 100 pounds, the facility would
have to report all releases of 130 pounds or more of that substance. Releases of less than 130
pounds would not need to be reported under CERCLA or EPCRA because even though the facility
exceeded its permit limit, the amount released did not exceed the permitted level by its reportable
quantity (in this case, 100 pounds) or more. If the air permit does not allow or does not specify the
release of a hazardous air pollutant, then releases in excess of the CERCLA / EPCRA reportable
quantity for that substance must be reported. Please be aware that other reporting requirements are
triggered, however, based on the facility's air permit. The Clean Air Act (CAA) requires that
permits for stationary air sources have language requiring prompt reporting of any emergencies,
upsets and deviations from what is allowed in the permit. Releases must be reported to the National
Response Center and to the Colorado Department of Public Health and Environment. Contact the
Air Pollution Control Division for details on additional air-related requirements that may also apply.
Hazardous air pollutants are included in the CERCLA list of hazardous substances in 40 CFR Part
302 and are assigned the reportable quantity listed in Table 302.4 for each substance.
State Requirements
In the case of excess emissions during an emergency or malfunction, the owner or operator must
notify the Colorado Department of Public Health and Environment as soon as possible, but no later
than noon of the next working day, and provide a written follow-up report to the Air Pollution
Control Division by the end of the facility’s next reporting period.
These notification and reporting requirements are included in 5 CCR 1001-2 Section II.E and 5
CCR 1001-5, Regulation 3 Part C, Section VII.C.
H. Underground Storage Tanks (USTs) and Aboveground Storage Tanks
(ASTs)
The reportable quantity for petroleum
from a regulated storage tank system
is 25 gallons.
Owners and operators of regulated storage tank systems
must report a release or suspected release of regulated
substances to the Division of Oil and Public Safety at the
Colorado Department of Labor and Employment within 24
hours by telephone or facsimile. If outside normal working hours or on a weekend or holiday and
emergency assistance is needed, the release can be reported to the Colorado Environmental Release
and Incident Reporting line at the Colorado Department of Public Health and Environment. Any
suspected release or release of unknown quantity is a reportable quantity unless the owner/operator
can conclusively show the release is less than the reportable quantity for the released substance.
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Reporting Environmental Releases in Colorado January 2009
Under this program, the reportable quantity for petroleum releases is 25 gallons or more from
regulated aboveground and underground storage tank systems, or any amount that causes a sheen on
nearby surface water. This is interpreted to include releases from fuel pumps and fuel delivery
trucks while connected to the petroleum storage tank system. Releases of less than 25 gallons from
regulated petroleum storage tank systems, or a release of a hazardous substance that is less than the
CERCLA reportable quantity, do not need to be reported to the Division of Oil and Public Safety if
they are immediately contained and cleaned up. If cleanup cannot be accomplished within 24
hours, the Division of Oil and Public Safety must be notified immediately.
Spills or releases of hazardous substances in excess of the CERCLA reportable quantity from
regulated underground storage tanks must also be reported to the National Response Center and the
local fire authority immediately. Any release, regardless of quantity, that has or may impact waters
of the state (including surface water, groundwater, dry gullies leading to surface water or storm
sewers) must also be reported to the Colorado Environmental Release and Incident Reporting line
immediately.
These notification and reporting requirements are included in 7 CCR 1101-14 Article 4, 8-20.5-208
CRS and 25-8-601 CRS.
I. Hazardous Materials Transportation
Highway, Aircraft, Rail and Vessel
Federal hazardous materials transportation regulations cover the transportation of hazardous
materials by highway, aircraft, rail, and vessel. Transportation includes activities related to
transportation like loading, unloading, and temporary storage. "Hazardous material" includes
hazardous substances, hazardous wastes, marine pollutants, elevated temperature materials as
defined in 49 CFR Section 171.8, materials designated as hazardous in the Hazardous Materials
Table in 49 CFR Section 172.101 and materials that meet the criteria for hazardous classes and
division in 49 CFR Part 173.
The person in physical possession of the hazardous material during transportation must notify the
National Response Center as soon as practical, but not more than 12 hours after an incident, if as a
direct result of a hazardous material:
a person is killed or is injured and requires hospitalization,
there is an evacuation of the general public that lasts more than an hour,
a major transportation artery or facility is shut down for an hour or more,
the operational flight pattern or routine of an aircraft is altered,
there is fire, breakage, spillage, or suspected contamination involving a radioactive material,
there is fire, breakage, spillage, or suspected contamination involving an infectious
substance other than a regulated medical waste,
there is a release of a marine pollutant in a quantity exceeding 119 gallons for liquids or 882
pounds for solids,
or any situation that, in the judgment of the person in possession of the hazardous material,
should be reported even though it doesn't meet the above criteria.
Notice of incidents involving an infectious substance may be given to the Director of the Centers
for Disease Control and Prevention (1-800-232-0124) instead of notifying the National Response
Center.
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Reporting Environmental Releases in Colorado January 2009
The person in possession of the hazardous material at the time of the incident must submit a written
report within 30 days of the incident to the US Department of Transportation. In addition, a written
report must be submitted if there is an unintentional release of a hazardous material or the discharge
of any quantity of hazardous waste even though verbal notification may not be required. If the
incident involves air transportation, a copy of the report must also be submitted to the Federal
Aviation Administration Security Field Office nearest the location of the incident.
These notification and reporting requirements are included in 49 CFR Sections 171.15 and 171.16.
State Requirements
The State also has specific requirements for reporting incidents involving hazardous materials or
nuclear materials as cargo during transportation. The driver of a motor vehicle involved in a spill of
hazardous material from a fuel tank that provides fuel for the vehicle and/or equipment on that
vehicle must immediately notify the nearest law enforcement agency. The driver of a vehicle
transporting nuclear or hazardous materials as cargo that is involved in a spill, or an incident which
may result in a potential spill, must immediately notify the nearest law enforcement agency. As
soon as possible after the initial notification of the spill or incident to the nearest law enforcement
agency, the driver or a company representative must notify the Colorado State Patrol and the 24-
hour Colorado Environmental Release and Incident Reporting Line. In addition, the driver of a
motor vehicle transporting nuclear materials as cargo must immediately notify the Colorado State
Patrol if the vehicle is involved in a crash, whether or not there is damage to the vehicle.
Report releases along a highway to the
National Response Center, nearest local
law enforcement agency, Colorado State
Patrol, and Colorado Environmental
Release and Incident Reporting Line.
If the incident involves the release of hazardous
waste, the transporter must notify the Colorado
Department of Public Health and Environment and
report the ultimate disposition of the waste to the
Department in addition to the notifications above. In
the event of a spill of hazardous waste at a transfer
facility, the transporter must notify the Colorado Department of Public Health and Environment
within 24 hours of a spill exceeding 55 gallons or if there is a fire or explosion. A written report
must be sent to the Department within 15 days after the incident.
These notification and reporting requirements are included in 8 CCR 1507-25 Parts I and IV and 6
CCR 1007-3 Part 263.
Pipelines
In Colorado, the US Department of Transportation Office of Pipeline Safety inspects, regulates, and
enforces interstate gas pipeline safety requirements. They also inspect, regulate, and enforce both
intra- and interstate liquid pipeline safety requirements in this state. Through certification by the
Office of Pipeline Safety, the Gas Pipeline Safety Division of the Colorado Public Utilities
Commission regulates, inspects, and enforces intrastate gas pipeline safety requirements. Pipeline
facilities include transmission, distribution, regulated gathering, master metered, liquefied natural
gas, and propane gas systems. Be aware that these regulations are primarily for pipeline safety. Be
sure to review other environmental release reporting requirements.
Hazardous Liquids and Carbon Dioxide
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Reporting Environmental Releases in Colorado January 2009
Federal hazardous materials transportation regulations cover the transportation of hazardous liquids
and carbon dioxide by pipeline. In this case, hazardous liquid is limited to petroleum, petroleum
products, and anhydrous ammonia in a non-gaseous state. Petroleum includes crude oil,
condensate, natural gasoline, natural gas liquids, and liquefied petroleum gas. Petroleum product
includes flammable, toxic or corrosive products obtained from distilling and processing of crude oil,
unfinished oils, natural gas liquids, blend stocks, and other miscellaneous hydrocarbon compounds.
As early as practicable following discovery of a release of a hazardous liquid or carbon dioxide
from a pipeline system, the operator must notify the National Response Center by telephone if:
a person is killed or is injured and requires hospitalization,
there is a fire or explosion not intentionally set by the operator,
there is estimated property damage (including cost of cleanup and recovery, value of lost
product, and damage to property) exceeding $50,000,
there is pollution of any stream, river, reservoir, or other body of water that violated
applicable water quality standards, caused a discoloration of the surface of the water or
adjoining shoreline, or deposited a sludge or emulsion beneath the surface of the water or
adjoining shoreline, or
there is any situation that, in the judgment of the operator, should be reported even though it
doesn't meet the above criteria.
A written accident report must be submitted to the US Department of Transportation Office of
Pipeline Safety as soon as practicable, but not later than 30 days after discovery of a release. A
supplemental report must be submitted within 30 days if the operator receives any updates or
additions to the information originally reported.
These notification and reporting requirements are included in 49 CFR Part 195.
Natural Gas and Liquefied Natural Gas
Federal hazardous materials transportation regulations also cover the transportation of natural gas
by pipeline and activities occurring at a liquefied natural gas (LNG) facility where natural and
synthetic gas are liquefied, transferred or stored.
As early as practicable following discovery of a release of gas from a pipeline or of liquefied natural
gas or gas from a liquefied natural gas facility, but generally not to exceed two hours after
discovery, the operator must notify the National Response Center and the Colorado Public Utilities
Commission Gas Pipeline Safety Section by telephone if:
a person is killed or is injured and requires hospitalization,
there is estimated property damage (including value of lost product and damage to property)
of $50,000 or more,
there is an event that results in an emergency shutdown of a liquefied natural gas facility, or
there is any situation that, in the judgment of the operator, should be reported even though it
doesn't meet the above criteria.
As early as practicable, but not later than 30 days after discovery and verbal report of a release, the
operator must submit a written report to the US Department of Transportation Office of Pipeline
Safety. A supplemental report must be submitted within 30 days if the operator receives relevant
updates or additions to the information originally reported.
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Reporting Environmental Releases in Colorado January 2009
These notification and reporting requirements are included in 49 CFR Part 191 and 4 CCR 723-4
Sections 4900 - 4914.
State Requirements
If there is a leak on a gas pipeline, a liquefied natural gas system, a master meter system, or a
propane system that results in the evacuation of 50 or more people from a normally occupied
building or results in the closure of a roadway, the operator must contact the Colorado Public
Utilities Commission Gas Pipeline Safety Section by telephone within two hours of discovery.
This notification requirement is contained in 4 CCR 723-4 Section 4911.
J. Oil and Gas Exploration and Production
Federal oil and gas lease surface operations are managed by the US Department of the Interior
Bureau of Land Management (BLM) in cooperation with the appropriate Federal surface
management agency or non-Federal surface owner. On National Forest System lands, the Forest
Service has approval authority for the surface use portion of Federal oil and gas operations and for
appeals related to Forest Service decisions and approvals. The BLM considers the Bureau of Indian
Affairs to be the surface management agency for all Indian lands unless a Tribe has contracted the
Bureau of Indian Affairs realty function for its lands.
“… All spills or leakages of oil, gas, salt water, toxic liquids or waste materials, blowouts, fires,
personal injuries, and fatalities shall be reported by the operator to the BLM and the surface
management agency in accordance with the requirements of Notice to Lessees NTL-3A; Reporting
of Undesirable Events, and in accordance with any applicable local requirements.
The BLM requires immediate reporting of all Class I major events, such as spills of more than 100
barrels of fluid/500 MCF of gas released; fires that consume 100 bbl or more oil or 500 MCF gas;
life threatening or fatal injury/loss of well control; release of reportable quantities of hazardous
substances; spill, venting, or fire in sensitive areas, such as parks, recreation sites, wildlife refuges,
lakes, reservoirs, streams, and urban or suburban areas” … “Volumes discharged during any of the
above incidents will be estimated as necessary. Operators must take immediate action to prevent
and control spills and the BLM, the surface management agency, and other applicable regulatory
authorities must be consulted prior to treating or disposing of wastes and spills. Operators should
become familiar with local surface management agency requirements for reporting and managing
spills and leaks. …” (BLM “The Gold Book,” Fourth Edition, Revised 2007)
State Requirements
Spills and releases of Exploration and Production (E&P) waste and produced fluids should be
controlled and contained immediately upon discovery. Impacts resulting from spills and releases
should be investigated and cleaned up as soon as practicable.
If there is a spill or release of more than 20 barrels of
E&P waste, it must be verbally reported to the Colorado
Oil and Gas Conservation Commission (COGCC) as soon
as practicable, but not more than 24 hours after discovery.
If there is a spill or release of any size that impacts or
The rules and regulations for oil and
gas exploration and production have
recently been revised. Most of these
changes become effective May 1,
2009 on federal land and April 1, 2009
on all other land.
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Reporting Environmental Releases in Colorado January 2009
16
could impact waters of the state, a residence or an occupied structure, livestock or a public byway, it
must be verbally reported to the Colorado Oil and Gas Conservation Commission as soon as
practicable, but not more than 24 hours after discovery. Spills or releases of any size that impact or
threaten to impact any surface water supply area must be reported to the Colorado Oil and Gas
Conservation Commission and to the Colorado Environmental Release and Incident Reporting Line.
If the release impacts or threatens to impact a surface water intake, it must be verbally reported to
the emergency contact for that facility immediately after discovery. The operator must notify the
affected surface owner or their appointed tenant of all reportable spills as soon as practicable, but
not more than 24 hours after discovery.
Chemical spills and releases must be reported in accordance with all applicable state and federal
laws, including the Emergency Planning and community Right-to-Know Act (EPCRA), the
Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), the Oil
Pollution Act, and the Clean Water Act.
Releases of more than 5 barrels of E&P waste, and all other reportable releases, must also be
reported on COGCC Form 19 and submitted to the Colorado Oil and Gas Conservation
Commission within 10 days after discovery of the release.
These notification requirements are contained in the Colorado Oil and Gas Conservation
Commission 900-Series Rules.
K. Polychlorinated Biphenyls
Polychlorinated biphenyls (PCBs) are managed under the Toxic Substances Control Act.
Substances with concentrations greater than or equal to 50 parts per million PCBs are regulated
under 40 CFR Part 761, which is implemented by the US Environmental Protection Agency. If a
spill of the substance directly contaminates surface water, sewers, drinking water supplies, grazing
lands, or vegetable gardens and/or the spill exceeds 10 pounds of PCBs by weight, the responsible
party must notify the EPA within 24 hours. In Colorado, contact the Region 8 Emergency Response
Spill Report Line. If the spill involves 10 pounds or less of PCBs and does not involve any of these
resources, the spill must still be cleaned up, but notification to EPA isn't required. Unless
commingled with a hazardous waste, releases of substances containing less than 50 parts per million
PCBs are regulated under Colorado's solid waste regulations 6 CCR 1007-2. The solid waste
regulations do not have specific release reporting requirements at this time.
The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) has set
the reportable quantity for PCBs at one (1) pound. Any release of oil or other substance containing
greater than or equal to one pound of PCBs must be reported to the National Response Center as
soon as the release is discovered. In addition, if the release impacts waters of the state of Colorado,
the release must be reported as per the Water Quality Control Division’s reporting policy (see
“Guidance for Reporting Spills under the Colorado Water Quality Control Act and Colorado
Discharge Permits”, http://www.cdphe.state.co.us/op/wqcc/Resources/Guidance/spillguidance.pdf).
Reporting Environmental Releases in Colorado January 2009
Abbreviations & Definitions
CAA – Clean Air Act
CCR – Code of Colorado Regulations
CDPHE – Colorado Department of Public Health and Environment
CEPC – Colorado Emergency Planning Commission
CERCLA – Comprehensive Environmental Response, Compensation and Liability Act
CFR – Code of Federal Regulations
CRS – Colorado Revised Statues
CWA – Clean Water Act
EPA – United States Environmental Protection Agency
EPCRA – Emergency Planning and Community Right-to-Know Act
LEPC – Local Emergency Planning Committee
NRC – National Response Center
RCRA – Resource Conservation and Recovery Act
SERC – State Emergency Response Commission
SDWA – Safe Drinking Water Act
EPA's List of Lists is a compendium of the lists of chemicals subject to reporting requirements
under the Emergency Planning and Community Right-to-Know Act (EPCRA), the Comprehensive
Environmental Response, Compensation and Liability Act (CERCLA) and chemicals listed under
section 112(r) of the Clean Air Act (CAA). Lists are also provided of Resource Conservation and
Recovery Act (RCRA) hazardous wastes and radionuclides reportable under the Comprehensive
Environmental Response, Compensation and Liability Act. These lists should be used as reference
tools, not as a definitive source of compliance information. Reporting requirements for the
Emergency Planning and Community Right-to-Know Act and the Comprehensive Environmental
Response, Compensation and Liability Act are published in the Code of Federal Regulations (CFR),
40 CFR Parts 302 and 355 respectively. Compliance information for the Clean Air Act section
112(r) is published in 40 CFR Part 68. The List of Lists is available on the Internet at
http://yosemite.epa.gov/oswer/lol.nsf/homepage.
Exploration and production (E&P) wastes are associated with operations to locate or remove oil
or gas from the ground or to remove the impurities from oil or gas.
Extremely Hazardous Substances (EHS) are chemicals that present the most serious hazards
during release (in terms of toxicity, reactivity, volatility, combustibility, and flammability) and are
regulated under the Emergency Planning and Community Right-To-Know Act (EPCRA). The
extremely hazardous substances list consists of approximately 360 substances and is included in
EPA’s List of Lists.
Facility means any building, equipment, structure, installation, containment structure, pipe, other
stationary feature, motor vehicle, rolling stock, or aircraft. Facility also includes any site where a
hazardous substance is or has been located.
Hazardous Materials are chemicals posing a hazard to human health or the environment when
transported (49 USC 5103). They include hazardous substances, hazardous wastes, marine
pollutants, elevated temperature materials, all materials in the Hazardous Materials Table (49 CFR
172.101), and materials meeting the criteria for hazard classes in part 173 of subchapter C of 49
CFR 172.101.
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Reporting Environmental Releases in Colorado January 2009
18
Hazardous Substances are chemicals posing a hazard to human health or the environment and are
regulated under the Comprehensive Environmental Response, Compensation and Liability Act
(CERCLA). The hazardous substance list is included in EPA’s List of Lists.
Reportable Quantity (RQ) is a term that applies to the amount of hazardous substances or
extremely hazardous substances released within a 24-hour period. Note that the 24-hour period is
the time frame for measuring the quantity released, not the time frame for reporting a release.
Threshold Planning Quantity (TPQ) is a term that applies to the amount of an extremely
hazardous substance that must be present onsite in concentrations greater than 1% by weight of a
compound or mixture at which the facility must meet all emergency planning requirements. If not
also listed as a CERCLA hazardous substance, extremely hazardous substances have a reportable
quantity equal to the threshold planning quantity for that substance.
“Waters of the State of Colorado” are any and all surface waters and subsurface waters
(groundwater) that are contained in or flow in or through the state of Colorado. This includes lakes,
rivers, streams, creeks, wetlands, irrigation ditches, storm drains, livestock ponds, borrow ditches,
and dry gullies. This does not include waters in sewage systems, waters in treatment works of
disposal systems, waters in potable water distribution systems, or water withdrawn for use until use
and treatment have been completed.
APPENDIX F
Inactivation and Reassignment Forms
Page 1 of 3 March 2019
Dedicated to protecting and improving the health
and environment of the people of Colorado
FOR DIVIISION USE ONLY
Effective date____________________
COLORADO WATER QUALITY CONTROL DIVISION CDPS PERMIT TERMINATION APPLICATION
Print or type all information. Mail original form with ink signature to the following address. Emailed and Faxed forms
will not be accepted. All items must be filled out completely and correctly. If the form is not complete, you will be
asked to resubmit it.
Colorado Dept of Public Health and Environment
Water Quality Control Division WQCD-P-B2
4300 Cherry Creek Drive South
Denver CO 80246-1530
PART A. IDENTIFICATION OF PERMIT OR AUTHORIZATION - Please limit submission to one permit, certification,
or authorization per form. All permit termination dates are effective on the date approved by the division.
Processing times vary by type of discharge. Some discharge types require onsite inspections to verify
information in this application.
PERMIT, CERTIFICATION, OR AUTHORIZATION NUMBER (DOES NOT END IN 0000)____________________
PART B. PERMITTEE INFORMATION
Company Name______________________________________________________________________________
Legal Contact First Name____________________________Last Name_________________________________
Title________________________________
Mailing Address______________________________________________________________________________
City __________________________________State_______________Zip Code__________________________
Phone____________________________Email address______________________________________________
PART C. FACILITY OR PROJECT INFORMATION
Facility/Project name________________________________________________________________________
Location/Address ___________________________________________________________________________
City __________________________________________County_______________________________________
Local contact name________________________________________Title______________________________
Phone___________________________ Email address_______________________________________________
PART D. TERMINATION INFORMATION QUESTIONS Provide information for Part D that applies to your facility and
termination request. Not all questions need to be answered- only the part that applies to your facility.
Part D1 covers facilities no longer in operation. (non-mining)
Part D2 covers mining facilities no longer in operation
Part D3 covers facilities in operation but no longer discharging or needing permit coverage.
Part D4 covers Stormwater Construction facilities where construction is complete and the site is stabilized.
**Please answer questions as completely as possible to assist in timely approval of this termination request.**
D1. FACILITY IS NO LONGER IN OPERATION AT THIS LOCATION (non-mining)
All activities and discharges at the identified site have ceased; all potential pollutant sources have been
removed; all industrial wastes have been disposed of properly; all DMR’s, Annual Reports, and other reports
have been submitted; and all elements of a Stormwater Management Plan have been completed (if this
applies).
**FOR LAGOONS: please reference “information regarding Domestic
Treatment Works Closure at Wastewater Treatment Facilities”
COLORADO WATER QUALITY CONTROL DIVISION TERMINATION APPLICATION www.coloradowaterpermits.com
Page 2 of 3 March 2019
D2. MINING FACILITY IS NO LONGER IN OPERATION AT THIS LOCATION.
Sand and Gravel, Coal or Hard Rock Mining
A. Mining operation is no longer discharging process/treated water. Bond has not been released by DRMS.
A stormwater only permit is requested at this time. Attach application for Stormwater Only permit.
B. Reclamation of mining site is completed. Bond has been released by DRMS.
___ YES Attach a copy of the Bond release letter. ___NO Explain below:
C. Reclamation of mining site is complete. Any remaining mine drainage meets WQP-1 criteria (Permit
Inactivation Policy Where a Discharge Remains) for termination (e.g. Adit, seeps, or spoils springs)?
___ YES, Please explain, attach additional pages as necessary.
D3. FACILITY IS STILL IN OPERATION BUT IS NO LONGER DISCHARGING OR NO LONGER NEEDS A PERMIT
A. Facility continues to operate, however the activity producing the discharge has ceased (including
changes in SIC Code resulting in change in duty to apply).
B. Termination is based on alternate disposal of discharges (discharge is being disposed of in another way)
or alternate coverage requirements:
a. Solid waste disposal unit (e.g. evaporative ponds)
b. No Exposure Exclusion (for industrial stormwater facilities only.) NOX Number_________________
c. Combined with another authorized discharge. Permit Number ____________________
d. Facility is replacing a permitted discharge with 100% reclaimed water under Regulation 84 –
Reclaimed Water Control Regulation. *Please attach a completed “Termination Application
Supplemental Information Form for Transitioning a Permitted Discharge to 100% Reclaimed
Water.”
e. Permit is not required (e.g., covered by low risk policy, requested permit inactivation where
discharge remains) – please explain, attach additional pages if necessary
C. PERMITTEE IS NO LONGER THE OWNER/OPERATOR OF THE SITE and all efforts have been made to
transfer the permit to appropriate parties. Please attach copies of registered mail receipts, letters,
etc.
D4. STORMWATER CONSTRUCTION FACILITIES WHERE CONSTRUCTION IS COMPLETE (Select A, B, or C)
A. SITE IS FINALLY STABILIZED OR CONSTRUCTION WAS NOT STARTED
a. The permitted activities meet the requirements for FINAL stabilization in accordance with the
permit, the Stormwater Management Plan, and as described in item b. (explanation can be
construction activities were not started).
b. Describe the methods used to meet final stabilization. (Required) *Final Stabilization defined on page 3
COLORADO WATER QUALITY CONTROL DIVISION TERMINATION APPLICATION www.coloradowaterpermits.com
Page 3 of 3 March 2019
D4. STORMWATER CONSTRUCTION FACILITIES WHERE CONSTRUCTION IS COMPLETE (Continued)
B. ALTERNATIVE PERMIT COVERAGE OR FULL REASSIGNMENT
a. All ongoing construction activities including all disturbed areas, covered under the permit
certification listed in Part B have coverage under a separate CDPS St ormwater Construction
permit. The Division’s Reassignment form was used by the permittee to reassign all areas and
activities.
b. Permit certification number covering the ongoing activities (Required)_____________________
C. PERMITTEE IS NO LONGER THE OWNER OR OPERATOR OF THE FACILITY
All efforts have been made to transfer the permit to appropriate parties.
Please attach copies of registered mail receipt, letters, etc.
*Final stabilization is reached when: all ground surface disturbing activities at the site have been completed
including removal of all temporary erosion and sediment control measure, and uniform vegetative cover has been
established with an individual plant density of at least 70 percent of predisturbance levels, or equivalent
permanent, physical erosion reduction methods have been employed.
PART E. CERTIFICATION SIGNATURE REQUIRED FOR ALL TERMINATION REQUESTS
I certify under penalty of law that this document and all attachments were prepared under my direction and/or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those individuals immediately responsible for gathering the information, the information submitted is to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant
penalties for submitting false information, including the possibility of fine and imprisonment for knowing
violations. “(See 18 USC 1001 and 33 USC 1319)
I certify that I am the legal representative of the above named company (PART B page 1).
Applies to Stormwater Construction terminations:
I understand that by submitting this notice of termination, I am no longer authorized to discharge stormwater
associated with construction activity by the general permit. I understand that discharging pollutants in
stormwater associated with construction activities to the waters of the State of Colorado, where such
discharges are not authorized by a CDPS permit, is unlawful under the Colorado Water Quality Control Act and
the Clean Water Act.
Signature of Legally Responsible Party Date Signed
Name (printed) Title
Signatory requirements: This termination request shall be signed, dated, and certified for accuracy by the permittee in
accord with the following criteria:
1. In the case of a corporation, by a principal executive officer of at least the level of vice-president, or his or her
duly authorized representative, if such representative is responsible for the overall operation of the operation
from which the discharge described herein originates;
2. In the case of a partnership, by a general partner;
3. In the case of a sole proprietorship, by the proprietor;
4. In the case of a municipal, state, or other public operation, by either a principal executive officer, ranking elected
offici al, or other duly authorized employee.
APPENDIX G
Soil Information
United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Larimer County
Area, ColoradoNatural
Resources
Conservation
Service
July 11, 2022
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?
cid=nrcs142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
Soil Map..................................................................................................................8
Soil Map................................................................................................................9
Legend................................................................................................................10
Map Unit Legend................................................................................................11
Map Unit Descriptions.........................................................................................11
Larimer County Area, Colorado......................................................................13
22—Caruso clay loam, 0 to 1 percent slope...............................................13
35—Fort Collins loam, 0 to 3 percent slopes..............................................14
54—Kim loam, 3 to 5 percent slopes..........................................................15
94—Satanta loam, 0 to 1 percent slopes....................................................17
98—Satanta Variant clay loam, 0 to 3 percent slopes.................................18
101—Stoneham loam, 1 to 3 percent slopes..............................................19
102—Stoneham loam, 3 to 5 percent slopes..............................................21
103—Stoneham loam, 5 to 9 percent slopes..............................................22
Soil Information for All Uses...............................................................................24
Soil Properties and Qualities..............................................................................24
Soil Qualities and Features.............................................................................24
Hydrologic Soil Group.................................................................................24
References............................................................................................................29
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
Custom Soil Resource Report
6
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
Custom Soil Resource Report
7
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
9
Custom Soil Resource Report
Soil Map
4495500449560044957004495800449590044960004496100449620044955004495600449570044958004495900449600044961004496200497500 497600 497700 497800 497900 498000
497500 497600 497700 497800 497900 498000
40° 37' 1'' N 105° 1' 47'' W40° 37' 1'' N105° 1' 21'' W40° 36' 34'' N
105° 1' 47'' W40° 36' 34'' N
105° 1' 21'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 150 300 600 900
Feet
0 50 100 200 300
Meters
Map Scale: 1:3,970 if printed on A portrait (8.5" x 11") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 16, Sep 2, 2021
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jun 8, 2021—Jun 12,
2021
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Custom Soil Resource Report
10
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
22 Caruso clay loam, 0 to 1
percent slope
17.8 37.4%
35 Fort Collins loam, 0 to 3 percent
slopes
6.9 14.5%
54 Kim loam, 3 to 5 percent slopes 0.0 0.1%
94 Satanta loam, 0 to 1 percent
slopes
1.6 3.3%
98 Satanta Variant clay loam, 0 to
3 percent slopes
9.3 19.6%
101 Stoneham loam, 1 to 3 percent
slopes
5.1 10.7%
102 Stoneham loam, 3 to 5 percent
slopes
3.1 6.5%
103 Stoneham loam, 5 to 9 percent
slopes
3.7 7.9%
Totals for Area of Interest 47.5 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
Custom Soil Resource Report
11
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Custom Soil Resource Report
12
Larimer County Area, Colorado
22—Caruso clay loam, 0 to 1 percent slope
Map Unit Setting
National map unit symbol: jpvt
Elevation: 4,800 to 5,500 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Caruso and similar soils:85 percent
Minor components:15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Caruso
Setting
Landform:Flood-plain steps, stream terraces
Landform position (three-dimensional):Tread
Down-slope shape:Linear
Across-slope shape:Linear
Parent material:Mixed alluvium
Typical profile
H1 - 0 to 35 inches: clay loam
H2 - 35 to 44 inches: fine sandy loam
H3 - 44 to 60 inches: gravelly sand
Properties and qualities
Slope:0 to 1 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Somewhat poorly drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat):Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table:About 24 to 48 inches
Frequency of flooding:NoneOccasional
Frequency of ponding:None
Calcium carbonate, maximum content:5 percent
Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water supply, 0 to 60 inches: Moderate (about 8.4 inches)
Interpretive groups
Land capability classification (irrigated): 3w
Land capability classification (nonirrigated): 5w
Hydrologic Soil Group: D
Ecological site: R067BY036CO - Overflow
Hydric soil rating: No
Minor Components
Loveland
Percent of map unit:9 percent
Custom Soil Resource Report
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Landform:Terraces
Ecological site:R067BY036CO - Overflow
Hydric soil rating: Yes
Fluvaquents
Percent of map unit:6 percent
Landform:Terraces
Hydric soil rating: Yes
35—Fort Collins loam, 0 to 3 percent slopes
Map Unit Setting
National map unit symbol: 2tlnc
Elevation: 4,020 to 6,730 feet
Mean annual precipitation: 14 to 16 inches
Mean annual air temperature: 46 to 48 degrees F
Frost-free period: 135 to 160 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Fort collins and similar soils:85 percent
Minor components:15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Fort Collins
Setting
Landform:Interfluves, stream terraces
Landform position (three-dimensional):Interfluve, tread
Down-slope shape:Linear
Across-slope shape:Linear
Parent material:Pleistocene or older alluvium and/or eolian deposits
Typical profile
Ap - 0 to 4 inches: loam
Bt1 - 4 to 9 inches: clay loam
Bt2 - 9 to 16 inches: clay loam
Bk1 - 16 to 29 inches: loam
Bk2 - 29 to 80 inches: loam
Properties and qualities
Slope:0 to 3 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high
(0.20 to 2.00 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:12 percent
Custom Soil Resource Report
14
Maximum salinity:Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm)
Available water supply, 0 to 60 inches: High (about 9.1 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: C
Ecological site: R067BY002CO - Loamy Plains
Hydric soil rating: No
Minor Components
Nunn
Percent of map unit:10 percent
Landform:Stream terraces
Landform position (three-dimensional):Tread
Down-slope shape:Linear
Across-slope shape:Linear
Ecological site:R067BY002CO - Loamy Plains
Hydric soil rating: No
Vona
Percent of map unit:5 percent
Landform:Interfluves
Landform position (three-dimensional):Side slope, interfluve
Down-slope shape:Linear
Across-slope shape:Linear
Ecological site:R067BY024CO - Sandy Plains
Hydric soil rating: No
54—Kim loam, 3 to 5 percent slopes
Map Unit Setting
National map unit symbol: jpwy
Elevation: 4,800 to 5,600 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Kim and similar soils:90 percent
Minor components:10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Kim
Setting
Landform:Fans
Landform position (three-dimensional):Base slope
Down-slope shape:Linear
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Across-slope shape:Linear
Parent material:Mixed alluvium
Typical profile
H1 - 0 to 7 inches: loam
H2 - 7 to 60 inches: clay loam
Properties and qualities
Slope:3 to 5 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high
(0.60 to 2.00 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:15 percent
Maximum salinity:Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm)
Available water supply, 0 to 60 inches: High (about 9.6 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: R067BZ902CO - Loamy Plains
Hydric soil rating: No
Minor Components
Thedalund
Percent of map unit:4 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Stoneham
Percent of map unit:3 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Fort collins
Percent of map unit:2 percent
Ecological site:R067BZ008CO - Loamy Slopes
Hydric soil rating: No
Aquic haplustolls
Percent of map unit:1 percent
Landform:Swales
Hydric soil rating: Yes
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94—Satanta loam, 0 to 1 percent slopes
Map Unit Setting
National map unit symbol: 2wz89
Elevation: 3,670 to 5,410 feet
Mean annual precipitation: 10 to 23 inches
Mean annual air temperature: 45 to 52 degrees F
Frost-free period: 105 to 160 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Satanta and similar soils:90 percent
Minor components:10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Satanta
Setting
Landform:Alluvial fans
Landform position (two-dimensional):Backslope
Landform position (three-dimensional):Head slope
Down-slope shape:Linear
Across-slope shape:Linear
Parent material:Alluvium
Typical profile
Ap - 0 to 10 inches: loam
Bt - 10 to 17 inches: clay loam
C - 17 to 79 inches: loam
Properties and qualities
Slope:0 to 1 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: Negligible
Capacity of the most limiting layer to transmit water (Ksat):Moderately high (0.20
to 0.60 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:10 percent
Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water supply, 0 to 60 inches: Very high (about 12.3 inches)
Interpretive groups
Land capability classification (irrigated): 1
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: C
Ecological site: R072XY111KS - Sandy Plains
Hydric soil rating: No
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Minor Components
Nunn
Percent of map unit:5 percent
Landform:Terraces
Landform position (three-dimensional):Tread
Down-slope shape:Linear
Across-slope shape:Linear
Ecological site:R072XY108KS - Loamy Lowland
Hydric soil rating: No
Fort collins
Percent of map unit:5 percent
Landform:Alluvial fans
Landform position (two-dimensional):Backslope
Landform position (three-dimensional):Head slope
Down-slope shape:Linear
Across-slope shape:Linear
Ecological site:R072XY111KS - Sandy Plains
Hydric soil rating: No
98—Satanta Variant clay loam, 0 to 3 percent slopes
Map Unit Setting
National map unit symbol: jpyh
Elevation: 4,800 to 5,600 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Satanta variant and similar soils:90 percent
Minor components:10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Satanta Variant
Setting
Landform:Terraces
Landform position (three-dimensional):Tread
Down-slope shape:Linear
Across-slope shape:Linear
Parent material:Alluvium
Typical profile
H1 - 0 to 9 inches: clay loam
H2 - 9 to 22 inches: clay loam
H3 - 22 to 60 inches: loam
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Properties and qualities
Slope:0 to 3 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Somewhat poorly drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat):Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table:About 24 to 48 inches
Frequency of flooding:NoneOccasional
Frequency of ponding:None
Calcium carbonate, maximum content:15 percent
Gypsum, maximum content:10 percent
Maximum salinity:Very slightly saline to slightly saline (2.0 to 4.0 mmhos/cm)
Available water supply, 0 to 60 inches: Moderate (about 8.7 inches)
Interpretive groups
Land capability classification (irrigated): 2e
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: D
Ecological site: R067BY036CO - Overflow
Hydric soil rating: No
Minor Components
Nunn
Percent of map unit:5 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Caruso
Percent of map unit:3 percent
Ecological site:R067BY036CO - Overflow
Hydric soil rating: No
Loveland
Percent of map unit:2 percent
Ecological site:R067BY036CO - Overflow
Hydric soil rating: No
101—Stoneham loam, 1 to 3 percent slopes
Map Unit Setting
National map unit symbol: jptt
Elevation: 4,800 to 5,600 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Prime farmland if irrigated
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Map Unit Composition
Stoneham and similar soils:90 percent
Minor components:10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Stoneham
Setting
Landform:Terraces, benches
Landform position (three-dimensional):Base slope, tread
Down-slope shape:Linear
Across-slope shape:Linear
Parent material:Mixed alluvium and/or eolian deposits
Typical profile
H1 - 0 to 4 inches: loam
H2 - 4 to 10 inches: sandy clay loam
H3 - 10 to 60 inches: clay loam
Properties and qualities
Slope:1 to 3 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high
(0.60 to 2.00 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:15 percent
Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water supply, 0 to 60 inches: High (about 9.6 inches)
Interpretive groups
Land capability classification (irrigated): 2e
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Ecological site: R067BZ902CO - Loamy Plains
Hydric soil rating: No
Minor Components
Kim
Percent of map unit:5 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Fort collins
Percent of map unit:5 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Custom Soil Resource Report
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102—Stoneham loam, 3 to 5 percent slopes
Map Unit Setting
National map unit symbol: 2x0j1
Elevation: 3,500 to 6,500 feet
Mean annual precipitation: 12 to 18 inches
Mean annual air temperature: 46 to 54 degrees F
Frost-free period: 115 to 155 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Stoneham and similar soils:85 percent
Minor components:15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Stoneham
Setting
Landform:Interfluves, low hills
Landform position (two-dimensional):Summit
Landform position (three-dimensional):Interfluve
Down-slope shape:Linear
Across-slope shape:Linear
Parent material:Mixed alluvial and/or eolian tertiary aged pedisediment
Typical profile
Ap - 0 to 4 inches: loam
Bt - 4 to 9 inches: clay loam
Btk - 9 to 13 inches: clay loam
Bk1 - 13 to 18 inches: loam
Bk2 - 18 to 34 inches: loam
C - 34 to 80 inches: loam
Properties and qualities
Slope:3 to 5 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high
(0.20 to 2.00 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:12 percent
Maximum salinity:Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm)
Sodium adsorption ratio, maximum:0.5
Available water supply, 0 to 60 inches: High (about 9.1 inches)
Interpretive groups
Land capability classification (irrigated): 4e
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Land capability classification (nonirrigated): 4c
Hydrologic Soil Group: C
Ecological site: R067BY002CO - Loamy Plains
Hydric soil rating: No
Minor Components
Satanta
Percent of map unit:5 percent
Landform:Interfluves
Landform position (two-dimensional):Summit
Landform position (three-dimensional):Interfluve
Down-slope shape:Linear
Across-slope shape:Linear
Ecological site:R067BY002CO - Loamy Plains
Hydric soil rating: No
Weld
Percent of map unit:5 percent
Landform:Interfluves
Landform position (two-dimensional):Summit
Landform position (three-dimensional):Interfluve
Down-slope shape:Linear
Across-slope shape:Linear
Ecological site:R067BY002CO - Loamy Plains
Hydric soil rating: No
Kimst
Percent of map unit:5 percent
Landform:Low hills, interfluves
Landform position (two-dimensional):Backslope, shoulder
Landform position (three-dimensional):Side slope
Down-slope shape:Convex
Across-slope shape:Convex
Ecological site:R067BY002CO - Loamy Plains
Hydric soil rating: No
103—Stoneham loam, 5 to 9 percent slopes
Map Unit Setting
National map unit symbol: jptw
Elevation: 4,800 to 5,600 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Farmland of local importance
Map Unit Composition
Stoneham and similar soils:85 percent
Minor components:15 percent
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Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Stoneham
Setting
Landform:Terraces, benches
Landform position (three-dimensional):Side slope, tread
Down-slope shape:Linear
Across-slope shape:Linear
Parent material:Mixed alluvium and/or eolian deposits
Typical profile
H1 - 0 to 3 inches: loam
H2 - 3 to 9 inches: clay loam
H3 - 9 to 60 inches: clay loam
Properties and qualities
Slope:5 to 9 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high
(0.60 to 2.00 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:15 percent
Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water supply, 0 to 60 inches: High (about 9.6 inches)
Interpretive groups
Land capability classification (irrigated): 6e
Land capability classification (nonirrigated): 6e
Hydrologic Soil Group: B
Ecological site: R067BZ902CO - Loamy Plains
Hydric soil rating: No
Minor Components
Kim
Percent of map unit:8 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Larimer
Percent of map unit:5 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Fort collins
Percent of map unit:2 percent
Ecological site:R067BZ902CO - Loamy Plains
Hydric soil rating: No
Custom Soil Resource Report
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Soil Information for All Uses
Soil Properties and Qualities
The Soil Properties and Qualities section includes various soil properties and
qualities displayed as thematic maps with a summary table for the soil map units in
the selected area of interest. A single value or rating for each map unit is generated
by aggregating the interpretive ratings of individual map unit components. This
aggregation process is defined for each property or quality.
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly
measured, but are inferred from observations of dynamic conditions and from soil
properties. Example soil qualities include natural drainage, and frost action. Soil
features are attributes that are not directly part of the soil. Example soil features
include slope and depth to restrictive layer. These features can greatly impact the
use and management of the soil.
Hydrologic Soil Group
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
24
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
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Custom Soil Resource Report
Map—Hydrologic Soil Group
4495500449560044957004495800449590044960004496100449620044955004495600449570044958004495900449600044961004496200497500 497600 497700 497800 497900 498000
497500 497600 497700 497800 497900 498000
40° 37' 1'' N 105° 1' 47'' W40° 37' 1'' N105° 1' 21'' W40° 36' 34'' N
105° 1' 47'' W40° 36' 34'' N
105° 1' 21'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 150 300 600 900
Feet
0 50 100 200 300
Meters
Map Scale: 1:3,970 if printed on A portrait (8.5" x 11") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 16, Sep 2, 2021
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jun 8, 2021—Jun 12,
2021
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Custom Soil Resource Report
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Table—Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
22 Caruso clay loam, 0 to 1
percent slope
D 17.8 37.4%
35 Fort Collins loam, 0 to 3
percent slopes
C 6.9 14.5%
54 Kim loam, 3 to 5 percent
slopes
B 0.0 0.1%
94 Satanta loam, 0 to 1
percent slopes
C 1.6 3.3%
98 Satanta Variant clay
loam, 0 to 3 percent
slopes
D 9.3 19.6%
101 Stoneham loam, 1 to 3
percent slopes
B 5.1 10.7%
102 Stoneham loam, 3 to 5
percent slopes
C 3.1 6.5%
103 Stoneham loam, 5 to 9
percent slopes
B 3.7 7.9%
Totals for Area of Interest 47.5 100.0%
Rating Options—Hydrologic Soil Group
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Custom Soil Resource Report
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References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/
home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepasture/?cid=stelprdb1043084
29
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?
cid=nrcs142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf
Custom Soil Resource Report
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